879b9073c8
2010-10-13 Paolo Carlini <paolo.carlini@oracle.com> * include/bits/random.h (discrete_distribution<>::param_type:: param_type()): Default construct the vectors. (discrete_distribution<>::param_type::probabilities): Adjust. (discrete_distribution<>::probabilities): Likewise. (discrete_distribution<>::max): Likewise. (piecewise_constant_distribution<>::param_type:: param_type()): Default construct the vectors. (piecewise_constant_distribution<>::param_type::intervals): Adjust. (piecewise_constant_distribution<>::param_type::densities): Likewise. (piecewise_constant_distribution<>::intervals): Likewise. (piecewise_constant_distribution<>::densities): Likewise. (piecewise_constant_distribution<>::min): Likewise. (piecewise_constant_distribution<>::max): Likewise. (piecewise_linear_distribution<>::param_type:: param_type()): Default construct the vectors. (piecewise_linear_distribution<>::param_type::intervals): Adjust. (piecewise_linear_distribution<>::param_type::densities): Likewise. (piecewise_linear_distribution<>::intervals): Likewise. (piecewise_linear_distribution<>::densities): Likewise. (piecewise_linear_distribution<>::min): Likewise. (piecewise_linear_distribution<>::max): Likewise. * include/bits/random.tcc (discrete_distribution<>::param_type:: _M_initialize): Deal quickly with raw _M_prob equivalent to a default constructed param_type, just clear the vector. (discrete_distribution<>::operator()): Early return 0 for a default constructed distribution. (piecewise_constant_distribution<>::param_type::_M_initialize): Likewise for _M_int and _M_den. (piecewise_constant_distribution<>::operator()): Early return for a default constructed distribution. (piecewise_linear_distribution<>::param_type::_M_initialize): Likewise. (piecewise_linear_distribution<>::operator()): Early return for a default constructed distribution. * testsuite/26_numerics/random/discrete_distribution/operators/ call-default.cc: New. * testsuite/26_numerics/random/piecewise_constant_distribution/ operators/call-default.cc: Likewise. From-SVN: r165427
5418 lines
152 KiB
C++
5418 lines
152 KiB
C++
// random number generation -*- C++ -*-
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// Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/**
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* @file bits/random.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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#ifndef _RANDOM_H
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#define _RANDOM_H 1
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#include <vector>
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namespace std
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{
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// [26.4] Random number generation
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/**
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* @defgroup random Random Number Generation
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* @ingroup numerics
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*
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* A facility for generating random numbers on selected distributions.
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* @{
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*/
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/**
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* @brief A function template for converting the output of a (integral)
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* uniform random number generator to a floatng point result in the range
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* [0-1).
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*/
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template<typename _RealType, size_t __bits,
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typename _UniformRandomNumberGenerator>
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_RealType
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generate_canonical(_UniformRandomNumberGenerator& __g);
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/*
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* Implementation-space details.
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*/
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namespace __detail
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{
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template<typename _UIntType, size_t __w,
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bool = __w < static_cast<size_t>
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(std::numeric_limits<_UIntType>::digits)>
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struct _Shift
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{ static const _UIntType __value = 0; };
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template<typename _UIntType, size_t __w>
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struct _Shift<_UIntType, __w, true>
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{ static const _UIntType __value = _UIntType(1) << __w; };
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template<typename _Tp, _Tp __m, _Tp __a, _Tp __c, bool>
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struct _Mod;
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// Dispatch based on modulus value to prevent divide-by-zero compile-time
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// errors when m == 0.
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template<typename _Tp, _Tp __m, _Tp __a = 1, _Tp __c = 0>
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inline _Tp
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__mod(_Tp __x)
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{ return _Mod<_Tp, __m, __a, __c, __m == 0>::__calc(__x); }
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/*
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* An adaptor class for converting the output of any Generator into
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* the input for a specific Distribution.
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*/
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template<typename _Engine, typename _DInputType>
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struct _Adaptor
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{
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public:
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_Adaptor(_Engine& __g)
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: _M_g(__g) { }
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_DInputType
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min() const
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{ return _DInputType(0); }
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_DInputType
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max() const
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{ return _DInputType(1); }
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/*
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* Converts a value generated by the adapted random number generator
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* into a value in the input domain for the dependent random number
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* distribution.
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*/
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_DInputType
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operator()()
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{
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return std::generate_canonical<_DInputType,
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std::numeric_limits<_DInputType>::digits,
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_Engine>(_M_g);
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}
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private:
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_Engine& _M_g;
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};
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} // namespace __detail
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/**
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* @addtogroup random_generators Random Number Generators
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* @ingroup random
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*
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* These classes define objects which provide random or pseudorandom
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* numbers, either from a discrete or a continuous interval. The
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* random number generator supplied as a part of this library are
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* all uniform random number generators which provide a sequence of
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* random number uniformly distributed over their range.
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*
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* A number generator is a function object with an operator() that
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* takes zero arguments and returns a number.
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*
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* A compliant random number generator must satisfy the following
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* requirements. <table border=1 cellpadding=10 cellspacing=0>
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* <caption align=top>Random Number Generator Requirements</caption>
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* <tr><td>To be documented.</td></tr> </table>
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*
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* @{
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*/
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/**
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* @brief A model of a linear congruential random number generator.
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*
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* A random number generator that produces pseudorandom numbers via
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* linear function:
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* @f[
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* x_{i+1}\leftarrow(ax_{i} + c) \bmod m
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* @f]
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*
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* The template parameter @p _UIntType must be an unsigned integral type
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* large enough to store values up to (__m-1). If the template parameter
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* @p __m is 0, the modulus @p __m used is
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* std::numeric_limits<_UIntType>::max() plus 1. Otherwise, the template
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* parameters @p __a and @p __c must be less than @p __m.
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*
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* The size of the state is @f$1@f$.
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*/
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template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>
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class linear_congruential_engine
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{
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static_assert(std::is_unsigned<_UIntType>::value, "template argument "
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"substituting _UIntType not an unsigned integral type");
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static_assert(__m == 0u || (__a < __m && __c < __m),
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"template argument substituting __m out of bounds");
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public:
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/** The type of the generated random value. */
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typedef _UIntType result_type;
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/** The multiplier. */
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static const result_type multiplier = __a;
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/** An increment. */
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static const result_type increment = __c;
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/** The modulus. */
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static const result_type modulus = __m;
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static const result_type default_seed = 1u;
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/**
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* @brief Constructs a %linear_congruential_engine random number
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* generator engine with seed @p __s. The default seed value
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* is 1.
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*
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* @param __s The initial seed value.
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*/
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explicit
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linear_congruential_engine(result_type __s = default_seed)
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{ seed(__s); }
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/**
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* @brief Constructs a %linear_congruential_engine random number
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* generator engine seeded from the seed sequence @p __q.
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*
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* @param __q the seed sequence.
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*/
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template<typename _Sseq, typename = typename
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std::enable_if<!std::is_same<_Sseq, linear_congruential_engine>::value>
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::type>
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explicit
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linear_congruential_engine(_Sseq& __q)
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{ seed(__q); }
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/**
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* @brief Reseeds the %linear_congruential_engine random number generator
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* engine sequence to the seed @p __s.
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*
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* @param __s The new seed.
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*/
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void
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seed(result_type __s = default_seed);
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/**
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* @brief Reseeds the %linear_congruential_engine random number generator
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* engine
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* sequence using values from the seed sequence @p __q.
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*
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* @param __q the seed sequence.
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*/
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template<typename _Sseq>
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typename std::enable_if<std::is_class<_Sseq>::value>::type
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seed(_Sseq& __q);
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/**
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* @brief Gets the smallest possible value in the output range.
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*
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* The minimum depends on the @p __c parameter: if it is zero, the
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* minimum generated must be > 0, otherwise 0 is allowed.
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*
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* @todo This should be constexpr.
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*/
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result_type
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min() const
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{ return __c == 0u ? 1u : 0u; }
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/**
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* @brief Gets the largest possible value in the output range.
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*
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* @todo This should be constexpr.
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*/
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result_type
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max() const
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{ return __m - 1u; }
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/**
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* @brief Discard a sequence of random numbers.
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*
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* @todo Look for a faster way to do discard.
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*/
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void
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discard(unsigned long long __z)
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{
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for (; __z != 0ULL; --__z)
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(*this)();
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}
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/**
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* @brief Gets the next random number in the sequence.
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*/
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result_type
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operator()()
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{
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_M_x = __detail::__mod<_UIntType, __m, __a, __c>(_M_x);
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return _M_x;
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}
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/**
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* @brief Compares two linear congruential random number generator
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* objects of the same type for equality.
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*
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* @param __lhs A linear congruential random number generator object.
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* @param __rhs Another linear congruential random number generator
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* object.
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*
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* @returns true if the infinite sequences of generated values
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* would be equal, false otherwise.
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*/
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friend bool
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operator==(const linear_congruential_engine& __lhs,
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const linear_congruential_engine& __rhs)
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{ return __lhs._M_x == __rhs._M_x; }
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/**
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* @brief Writes the textual representation of the state x(i) of x to
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* @p __os.
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*
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* @param __os The output stream.
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* @param __lcr A % linear_congruential_engine random number generator.
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* @returns __os.
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*/
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template<typename _UIntType1, _UIntType1 __a1, _UIntType1 __c1,
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_UIntType1 __m1, typename _CharT, typename _Traits>
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friend std::basic_ostream<_CharT, _Traits>&
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operator<<(std::basic_ostream<_CharT, _Traits>&,
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const std::linear_congruential_engine<_UIntType1,
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__a1, __c1, __m1>&);
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/**
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* @brief Sets the state of the engine by reading its textual
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* representation from @p __is.
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*
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* The textual representation must have been previously written using
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* an output stream whose imbued locale and whose type's template
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* specialization arguments _CharT and _Traits were the same as those
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* of @p __is.
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*
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* @param __is The input stream.
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* @param __lcr A % linear_congruential_engine random number generator.
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* @returns __is.
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*/
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template<typename _UIntType1, _UIntType1 __a1, _UIntType1 __c1,
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_UIntType1 __m1, typename _CharT, typename _Traits>
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friend std::basic_istream<_CharT, _Traits>&
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operator>>(std::basic_istream<_CharT, _Traits>&,
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std::linear_congruential_engine<_UIntType1, __a1,
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__c1, __m1>&);
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private:
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_UIntType _M_x;
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};
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/**
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* @brief Compares two linear congruential random number generator
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* objects of the same type for inequality.
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*
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* @param __lhs A linear congruential random number generator object.
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* @param __rhs Another linear congruential random number generator
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* object.
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*
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* @returns true if the infinite sequences of generated values
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* would be different, false otherwise.
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*/
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template<typename _UIntType, _UIntType __a, _UIntType __c, _UIntType __m>
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inline bool
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operator!=(const std::linear_congruential_engine<_UIntType, __a,
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__c, __m>& __lhs,
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const std::linear_congruential_engine<_UIntType, __a,
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__c, __m>& __rhs)
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{ return !(__lhs == __rhs); }
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/**
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* A generalized feedback shift register discrete random number generator.
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*
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* This algorithm avoids multiplication and division and is designed to be
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* friendly to a pipelined architecture. If the parameters are chosen
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* correctly, this generator will produce numbers with a very long period and
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* fairly good apparent entropy, although still not cryptographically strong.
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*
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* The best way to use this generator is with the predefined mt19937 class.
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*
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* This algorithm was originally invented by Makoto Matsumoto and
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* Takuji Nishimura.
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*
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* @var word_size The number of bits in each element of the state vector.
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* @var state_size The degree of recursion.
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* @var shift_size The period parameter.
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* @var mask_bits The separation point bit index.
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* @var parameter_a The last row of the twist matrix.
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* @var output_u The first right-shift tempering matrix parameter.
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* @var output_s The first left-shift tempering matrix parameter.
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* @var output_b The first left-shift tempering matrix mask.
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* @var output_t The second left-shift tempering matrix parameter.
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* @var output_c The second left-shift tempering matrix mask.
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* @var output_l The second right-shift tempering matrix parameter.
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*/
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template<typename _UIntType, size_t __w,
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size_t __n, size_t __m, size_t __r,
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_UIntType __a, size_t __u, _UIntType __d, size_t __s,
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_UIntType __b, size_t __t,
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_UIntType __c, size_t __l, _UIntType __f>
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class mersenne_twister_engine
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{
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static_assert(std::is_unsigned<_UIntType>::value, "template argument "
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"substituting _UIntType not an unsigned integral type");
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static_assert(1u <= __m && __m <= __n,
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"template argument substituting __m out of bounds");
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static_assert(__r <= __w, "template argument substituting "
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"__r out of bound");
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static_assert(__u <= __w, "template argument substituting "
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"__u out of bound");
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static_assert(__s <= __w, "template argument substituting "
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"__s out of bound");
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static_assert(__t <= __w, "template argument substituting "
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"__t out of bound");
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static_assert(__l <= __w, "template argument substituting "
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"__l out of bound");
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static_assert(__w <= std::numeric_limits<_UIntType>::digits,
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"template argument substituting __w out of bound");
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static_assert(__a <= (__detail::_Shift<_UIntType, __w>::__value - 1),
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"template argument substituting __a out of bound");
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static_assert(__b <= (__detail::_Shift<_UIntType, __w>::__value - 1),
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"template argument substituting __b out of bound");
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static_assert(__c <= (__detail::_Shift<_UIntType, __w>::__value - 1),
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"template argument substituting __c out of bound");
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static_assert(__d <= (__detail::_Shift<_UIntType, __w>::__value - 1),
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"template argument substituting __d out of bound");
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static_assert(__f <= (__detail::_Shift<_UIntType, __w>::__value - 1),
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"template argument substituting __f out of bound");
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public:
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/** The type of the generated random value. */
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typedef _UIntType result_type;
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// parameter values
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static const size_t word_size = __w;
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static const size_t state_size = __n;
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static const size_t shift_size = __m;
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static const size_t mask_bits = __r;
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static const result_type xor_mask = __a;
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static const size_t tempering_u = __u;
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static const result_type tempering_d = __d;
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static const size_t tempering_s = __s;
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static const result_type tempering_b = __b;
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static const size_t tempering_t = __t;
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static const result_type tempering_c = __c;
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static const size_t tempering_l = __l;
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static const result_type initialization_multiplier = __f;
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static const result_type default_seed = 5489u;
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// constructors and member function
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explicit
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mersenne_twister_engine(result_type __sd = default_seed)
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{ seed(__sd); }
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/**
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* @brief Constructs a %mersenne_twister_engine random number generator
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* engine seeded from the seed sequence @p __q.
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*
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* @param __q the seed sequence.
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*/
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template<typename _Sseq, typename = typename
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std::enable_if<!std::is_same<_Sseq, mersenne_twister_engine>::value>
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::type>
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explicit
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mersenne_twister_engine(_Sseq& __q)
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{ seed(__q); }
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void
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seed(result_type __sd = default_seed);
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template<typename _Sseq>
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typename std::enable_if<std::is_class<_Sseq>::value>::type
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seed(_Sseq& __q);
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|
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/**
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* @brief Gets the smallest possible value in the output range.
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*
|
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* @todo This should be constexpr.
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*/
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result_type
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min() const
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{ return 0; };
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|
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/**
|
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* @brief Gets the largest possible value in the output range.
|
|
*
|
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* @todo This should be constexpr.
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*/
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result_type
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max() const
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{ return __detail::_Shift<_UIntType, __w>::__value - 1; }
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|
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/**
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* @brief Discard a sequence of random numbers.
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|
*
|
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* @todo Look for a faster way to do discard.
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|
*/
|
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void
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discard(unsigned long long __z)
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{
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for (; __z != 0ULL; --__z)
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(*this)();
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}
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result_type
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operator()();
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|
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/**
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* @brief Compares two % mersenne_twister_engine random number generator
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* objects of the same type for equality.
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*
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* @param __lhs A % mersenne_twister_engine random number generator
|
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* object.
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* @param __rhs Another % mersenne_twister_engine random number
|
|
* generator object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be equal, false otherwise.
|
|
*/
|
|
friend bool
|
|
operator==(const mersenne_twister_engine& __lhs,
|
|
const mersenne_twister_engine& __rhs)
|
|
{ return std::equal(__lhs._M_x, __lhs._M_x + state_size, __rhs._M_x); }
|
|
|
|
/**
|
|
* @brief Inserts the current state of a % mersenne_twister_engine
|
|
* random number generator engine @p __x into the output stream
|
|
* @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A % mersenne_twister_engine random number generator
|
|
* engine.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _UIntType1,
|
|
size_t __w1, size_t __n1,
|
|
size_t __m1, size_t __r1,
|
|
_UIntType1 __a1, size_t __u1,
|
|
_UIntType1 __d1, size_t __s1,
|
|
_UIntType1 __b1, size_t __t1,
|
|
_UIntType1 __c1, size_t __l1, _UIntType1 __f1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::mersenne_twister_engine<_UIntType1, __w1, __n1,
|
|
__m1, __r1, __a1, __u1, __d1, __s1, __b1, __t1, __c1,
|
|
__l1, __f1>&);
|
|
|
|
/**
|
|
* @brief Extracts the current state of a % mersenne_twister_engine
|
|
* random number generator engine @p __x from the input stream
|
|
* @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A % mersenne_twister_engine random number generator
|
|
* engine.
|
|
*
|
|
* @returns The input stream with the state of @p __x extracted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _UIntType1,
|
|
size_t __w1, size_t __n1,
|
|
size_t __m1, size_t __r1,
|
|
_UIntType1 __a1, size_t __u1,
|
|
_UIntType1 __d1, size_t __s1,
|
|
_UIntType1 __b1, size_t __t1,
|
|
_UIntType1 __c1, size_t __l1, _UIntType1 __f1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::mersenne_twister_engine<_UIntType1, __w1, __n1, __m1,
|
|
__r1, __a1, __u1, __d1, __s1, __b1, __t1, __c1,
|
|
__l1, __f1>&);
|
|
|
|
private:
|
|
_UIntType _M_x[state_size];
|
|
size_t _M_p;
|
|
};
|
|
|
|
/**
|
|
* @brief Compares two % mersenne_twister_engine random number generator
|
|
* objects of the same type for inequality.
|
|
*
|
|
* @param __lhs A % mersenne_twister_engine random number generator
|
|
* object.
|
|
* @param __rhs Another % mersenne_twister_engine random number
|
|
* generator object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be different, false otherwise.
|
|
*/
|
|
template<typename _UIntType, size_t __w,
|
|
size_t __n, size_t __m, size_t __r,
|
|
_UIntType __a, size_t __u, _UIntType __d, size_t __s,
|
|
_UIntType __b, size_t __t,
|
|
_UIntType __c, size_t __l, _UIntType __f>
|
|
inline bool
|
|
operator!=(const std::mersenne_twister_engine<_UIntType, __w, __n, __m,
|
|
__r, __a, __u, __d, __s, __b, __t, __c, __l, __f>& __lhs,
|
|
const std::mersenne_twister_engine<_UIntType, __w, __n, __m,
|
|
__r, __a, __u, __d, __s, __b, __t, __c, __l, __f>& __rhs)
|
|
{ return !(__lhs == __rhs); }
|
|
|
|
|
|
/**
|
|
* @brief The Marsaglia-Zaman generator.
|
|
*
|
|
* This is a model of a Generalized Fibonacci discrete random number
|
|
* generator, sometimes referred to as the SWC generator.
|
|
*
|
|
* A discrete random number generator that produces pseudorandom
|
|
* numbers using:
|
|
* @f[
|
|
* x_{i}\leftarrow(x_{i - s} - x_{i - r} - carry_{i-1}) \bmod m
|
|
* @f]
|
|
*
|
|
* The size of the state is @f$r@f$
|
|
* and the maximum period of the generator is @f$(m^r - m^s - 1)@f$.
|
|
*
|
|
* @var _M_x The state of the generator. This is a ring buffer.
|
|
* @var _M_carry The carry.
|
|
* @var _M_p Current index of x(i - r).
|
|
*/
|
|
template<typename _UIntType, size_t __w, size_t __s, size_t __r>
|
|
class subtract_with_carry_engine
|
|
{
|
|
static_assert(std::is_unsigned<_UIntType>::value, "template argument "
|
|
"substituting _UIntType not an unsigned integral type");
|
|
static_assert(0u < __s && __s < __r,
|
|
"template argument substituting __s out of bounds");
|
|
static_assert(0u < __w && __w <= std::numeric_limits<_UIntType>::digits,
|
|
"template argument substituting __w out of bounds");
|
|
|
|
public:
|
|
/** The type of the generated random value. */
|
|
typedef _UIntType result_type;
|
|
|
|
// parameter values
|
|
static const size_t word_size = __w;
|
|
static const size_t short_lag = __s;
|
|
static const size_t long_lag = __r;
|
|
static const result_type default_seed = 19780503u;
|
|
|
|
/**
|
|
* @brief Constructs an explicitly seeded % subtract_with_carry_engine
|
|
* random number generator.
|
|
*/
|
|
explicit
|
|
subtract_with_carry_engine(result_type __sd = default_seed)
|
|
{ seed(__sd); }
|
|
|
|
/**
|
|
* @brief Constructs a %subtract_with_carry_engine random number engine
|
|
* seeded from the seed sequence @p __q.
|
|
*
|
|
* @param __q the seed sequence.
|
|
*/
|
|
template<typename _Sseq, typename = typename
|
|
std::enable_if<!std::is_same<_Sseq, subtract_with_carry_engine>::value>
|
|
::type>
|
|
explicit
|
|
subtract_with_carry_engine(_Sseq& __q)
|
|
{ seed(__q); }
|
|
|
|
/**
|
|
* @brief Seeds the initial state @f$x_0@f$ of the random number
|
|
* generator.
|
|
*
|
|
* N1688[4.19] modifies this as follows. If @p __value == 0,
|
|
* sets value to 19780503. In any case, with a linear
|
|
* congruential generator lcg(i) having parameters @f$ m_{lcg} =
|
|
* 2147483563, a_{lcg} = 40014, c_{lcg} = 0, and lcg(0) = value
|
|
* @f$, sets @f$ x_{-r} \dots x_{-1} @f$ to @f$ lcg(1) \bmod m
|
|
* \dots lcg(r) \bmod m @f$ respectively. If @f$ x_{-1} = 0 @f$
|
|
* set carry to 1, otherwise sets carry to 0.
|
|
*/
|
|
void
|
|
seed(result_type __sd = default_seed);
|
|
|
|
/**
|
|
* @brief Seeds the initial state @f$x_0@f$ of the
|
|
* % subtract_with_carry_engine random number generator.
|
|
*/
|
|
template<typename _Sseq>
|
|
typename std::enable_if<std::is_class<_Sseq>::value>::type
|
|
seed(_Sseq& __q);
|
|
|
|
/**
|
|
* @brief Gets the inclusive minimum value of the range of random
|
|
* integers returned by this generator.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return 0; }
|
|
|
|
/**
|
|
* @brief Gets the inclusive maximum value of the range of random
|
|
* integers returned by this generator.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return __detail::_Shift<_UIntType, __w>::__value - 1; }
|
|
|
|
/**
|
|
* @brief Discard a sequence of random numbers.
|
|
*
|
|
* @todo Look for a faster way to do discard.
|
|
*/
|
|
void
|
|
discard(unsigned long long __z)
|
|
{
|
|
for (; __z != 0ULL; --__z)
|
|
(*this)();
|
|
}
|
|
|
|
/**
|
|
* @brief Gets the next random number in the sequence.
|
|
*/
|
|
result_type
|
|
operator()();
|
|
|
|
/**
|
|
* @brief Compares two % subtract_with_carry_engine random number
|
|
* generator objects of the same type for equality.
|
|
*
|
|
* @param __lhs A % subtract_with_carry_engine random number generator
|
|
* object.
|
|
* @param __rhs Another % subtract_with_carry_engine random number
|
|
* generator object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be equal, false otherwise.
|
|
*/
|
|
friend bool
|
|
operator==(const subtract_with_carry_engine& __lhs,
|
|
const subtract_with_carry_engine& __rhs)
|
|
{ return std::equal(__lhs._M_x, __lhs._M_x + long_lag, __rhs._M_x); }
|
|
|
|
/**
|
|
* @brief Inserts the current state of a % subtract_with_carry_engine
|
|
* random number generator engine @p __x into the output stream
|
|
* @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A % subtract_with_carry_engine random number generator
|
|
* engine.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _UIntType1, size_t __w1, size_t __s1, size_t __r1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::subtract_with_carry_engine<_UIntType1, __w1,
|
|
__s1, __r1>&);
|
|
|
|
/**
|
|
* @brief Extracts the current state of a % subtract_with_carry_engine
|
|
* random number generator engine @p __x from the input stream
|
|
* @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A % subtract_with_carry_engine random number generator
|
|
* engine.
|
|
*
|
|
* @returns The input stream with the state of @p __x extracted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _UIntType1, size_t __w1, size_t __s1, size_t __r1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::subtract_with_carry_engine<_UIntType1, __w1,
|
|
__s1, __r1>&);
|
|
|
|
private:
|
|
_UIntType _M_x[long_lag];
|
|
_UIntType _M_carry;
|
|
size_t _M_p;
|
|
};
|
|
|
|
/**
|
|
* @brief Compares two % subtract_with_carry_engine random number
|
|
* generator objects of the same type for inequality.
|
|
*
|
|
* @param __lhs A % subtract_with_carry_engine random number generator
|
|
* object.
|
|
* @param __rhs Another % subtract_with_carry_engine random number
|
|
* generator object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be different, false otherwise.
|
|
*/
|
|
template<typename _UIntType, size_t __w, size_t __s, size_t __r>
|
|
inline bool
|
|
operator!=(const std::subtract_with_carry_engine<_UIntType, __w,
|
|
__s, __r>& __lhs,
|
|
const std::subtract_with_carry_engine<_UIntType, __w,
|
|
__s, __r>& __rhs)
|
|
{ return !(__lhs == __rhs); }
|
|
|
|
|
|
/**
|
|
* Produces random numbers from some base engine by discarding blocks of
|
|
* data.
|
|
*
|
|
* 0 <= @p __r <= @p __p
|
|
*/
|
|
template<typename _RandomNumberEngine, size_t __p, size_t __r>
|
|
class discard_block_engine
|
|
{
|
|
static_assert(1 <= __r && __r <= __p,
|
|
"template argument substituting __r out of bounds");
|
|
|
|
public:
|
|
/** The type of the generated random value. */
|
|
typedef typename _RandomNumberEngine::result_type result_type;
|
|
|
|
// parameter values
|
|
static const size_t block_size = __p;
|
|
static const size_t used_block = __r;
|
|
|
|
/**
|
|
* @brief Constructs a default %discard_block_engine engine.
|
|
*
|
|
* The underlying engine is default constructed as well.
|
|
*/
|
|
discard_block_engine()
|
|
: _M_b(), _M_n(0) { }
|
|
|
|
/**
|
|
* @brief Copy constructs a %discard_block_engine engine.
|
|
*
|
|
* Copies an existing base class random number generator.
|
|
* @param rng An existing (base class) engine object.
|
|
*/
|
|
explicit
|
|
discard_block_engine(const _RandomNumberEngine& __rne)
|
|
: _M_b(__rne), _M_n(0) { }
|
|
|
|
/**
|
|
* @brief Move constructs a %discard_block_engine engine.
|
|
*
|
|
* Copies an existing base class random number generator.
|
|
* @param rng An existing (base class) engine object.
|
|
*/
|
|
explicit
|
|
discard_block_engine(_RandomNumberEngine&& __rne)
|
|
: _M_b(std::move(__rne)), _M_n(0) { }
|
|
|
|
/**
|
|
* @brief Seed constructs a %discard_block_engine engine.
|
|
*
|
|
* Constructs the underlying generator engine seeded with @p __s.
|
|
* @param __s A seed value for the base class engine.
|
|
*/
|
|
explicit
|
|
discard_block_engine(result_type __s)
|
|
: _M_b(__s), _M_n(0) { }
|
|
|
|
/**
|
|
* @brief Generator construct a %discard_block_engine engine.
|
|
*
|
|
* @param __q A seed sequence.
|
|
*/
|
|
template<typename _Sseq, typename = typename
|
|
std::enable_if<!std::is_same<_Sseq, discard_block_engine>::value
|
|
&& !std::is_same<_Sseq, _RandomNumberEngine>::value>
|
|
::type>
|
|
explicit
|
|
discard_block_engine(_Sseq& __q)
|
|
: _M_b(__q), _M_n(0)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Reseeds the %discard_block_engine object with the default
|
|
* seed for the underlying base class generator engine.
|
|
*/
|
|
void
|
|
seed()
|
|
{
|
|
_M_b.seed();
|
|
_M_n = 0;
|
|
}
|
|
|
|
/**
|
|
* @brief Reseeds the %discard_block_engine object with the default
|
|
* seed for the underlying base class generator engine.
|
|
*/
|
|
void
|
|
seed(result_type __s)
|
|
{
|
|
_M_b.seed(__s);
|
|
_M_n = 0;
|
|
}
|
|
|
|
/**
|
|
* @brief Reseeds the %discard_block_engine object with the given seed
|
|
* sequence.
|
|
* @param __q A seed generator function.
|
|
*/
|
|
template<typename _Sseq>
|
|
void
|
|
seed(_Sseq& __q)
|
|
{
|
|
_M_b.seed(__q);
|
|
_M_n = 0;
|
|
}
|
|
|
|
/**
|
|
* @brief Gets a const reference to the underlying generator engine
|
|
* object.
|
|
*/
|
|
const _RandomNumberEngine&
|
|
base() const
|
|
{ return _M_b; }
|
|
|
|
/**
|
|
* @brief Gets the minimum value in the generated random number range.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return _M_b.min(); }
|
|
|
|
/**
|
|
* @brief Gets the maximum value in the generated random number range.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return _M_b.max(); }
|
|
|
|
/**
|
|
* @brief Discard a sequence of random numbers.
|
|
*
|
|
* @todo Look for a faster way to do discard.
|
|
*/
|
|
void
|
|
discard(unsigned long long __z)
|
|
{
|
|
for (; __z != 0ULL; --__z)
|
|
(*this)();
|
|
}
|
|
|
|
/**
|
|
* @brief Gets the next value in the generated random number sequence.
|
|
*/
|
|
result_type
|
|
operator()();
|
|
|
|
/**
|
|
* @brief Compares two %discard_block_engine random number generator
|
|
* objects of the same type for equality.
|
|
*
|
|
* @param __lhs A %discard_block_engine random number generator object.
|
|
* @param __rhs Another %discard_block_engine random number generator
|
|
* object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be equal, false otherwise.
|
|
*/
|
|
friend bool
|
|
operator==(const discard_block_engine& __lhs,
|
|
const discard_block_engine& __rhs)
|
|
{ return __lhs._M_b == __rhs._M_b && __lhs._M_n == __rhs._M_n; }
|
|
|
|
/**
|
|
* @brief Inserts the current state of a %discard_block_engine random
|
|
* number generator engine @p __x into the output stream
|
|
* @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %discard_block_engine random number generator engine.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RandomNumberEngine1, size_t __p1, size_t __r1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::discard_block_engine<_RandomNumberEngine1,
|
|
__p1, __r1>&);
|
|
|
|
/**
|
|
* @brief Extracts the current state of a % subtract_with_carry_engine
|
|
* random number generator engine @p __x from the input stream
|
|
* @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %discard_block_engine random number generator engine.
|
|
*
|
|
* @returns The input stream with the state of @p __x extracted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RandomNumberEngine1, size_t __p1, size_t __r1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::discard_block_engine<_RandomNumberEngine1,
|
|
__p1, __r1>&);
|
|
|
|
private:
|
|
_RandomNumberEngine _M_b;
|
|
size_t _M_n;
|
|
};
|
|
|
|
/**
|
|
* @brief Compares two %discard_block_engine random number generator
|
|
* objects of the same type for inequality.
|
|
*
|
|
* @param __lhs A %discard_block_engine random number generator object.
|
|
* @param __rhs Another %discard_block_engine random number generator
|
|
* object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be different, false otherwise.
|
|
*/
|
|
template<typename _RandomNumberEngine, size_t __p, size_t __r>
|
|
inline bool
|
|
operator!=(const std::discard_block_engine<_RandomNumberEngine, __p,
|
|
__r>& __lhs,
|
|
const std::discard_block_engine<_RandomNumberEngine, __p,
|
|
__r>& __rhs)
|
|
{ return !(__lhs == __rhs); }
|
|
|
|
|
|
/**
|
|
* Produces random numbers by combining random numbers from some base
|
|
* engine to produce random numbers with a specifies number of bits @p __w.
|
|
*/
|
|
template<typename _RandomNumberEngine, size_t __w, typename _UIntType>
|
|
class independent_bits_engine
|
|
{
|
|
static_assert(std::is_unsigned<_UIntType>::value, "template argument "
|
|
"substituting _UIntType not an unsigned integral type");
|
|
static_assert(0u < __w && __w <= std::numeric_limits<_UIntType>::digits,
|
|
"template argument substituting __w out of bounds");
|
|
|
|
public:
|
|
/** The type of the generated random value. */
|
|
typedef _UIntType result_type;
|
|
|
|
/**
|
|
* @brief Constructs a default %independent_bits_engine engine.
|
|
*
|
|
* The underlying engine is default constructed as well.
|
|
*/
|
|
independent_bits_engine()
|
|
: _M_b() { }
|
|
|
|
/**
|
|
* @brief Copy constructs a %independent_bits_engine engine.
|
|
*
|
|
* Copies an existing base class random number generator.
|
|
* @param rng An existing (base class) engine object.
|
|
*/
|
|
explicit
|
|
independent_bits_engine(const _RandomNumberEngine& __rne)
|
|
: _M_b(__rne) { }
|
|
|
|
/**
|
|
* @brief Move constructs a %independent_bits_engine engine.
|
|
*
|
|
* Copies an existing base class random number generator.
|
|
* @param rng An existing (base class) engine object.
|
|
*/
|
|
explicit
|
|
independent_bits_engine(_RandomNumberEngine&& __rne)
|
|
: _M_b(std::move(__rne)) { }
|
|
|
|
/**
|
|
* @brief Seed constructs a %independent_bits_engine engine.
|
|
*
|
|
* Constructs the underlying generator engine seeded with @p __s.
|
|
* @param __s A seed value for the base class engine.
|
|
*/
|
|
explicit
|
|
independent_bits_engine(result_type __s)
|
|
: _M_b(__s) { }
|
|
|
|
/**
|
|
* @brief Generator construct a %independent_bits_engine engine.
|
|
*
|
|
* @param __q A seed sequence.
|
|
*/
|
|
template<typename _Sseq, typename = typename
|
|
std::enable_if<!std::is_same<_Sseq, independent_bits_engine>::value
|
|
&& !std::is_same<_Sseq, _RandomNumberEngine>::value>
|
|
::type>
|
|
explicit
|
|
independent_bits_engine(_Sseq& __q)
|
|
: _M_b(__q)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Reseeds the %independent_bits_engine object with the default
|
|
* seed for the underlying base class generator engine.
|
|
*/
|
|
void
|
|
seed()
|
|
{ _M_b.seed(); }
|
|
|
|
/**
|
|
* @brief Reseeds the %independent_bits_engine object with the default
|
|
* seed for the underlying base class generator engine.
|
|
*/
|
|
void
|
|
seed(result_type __s)
|
|
{ _M_b.seed(__s); }
|
|
|
|
/**
|
|
* @brief Reseeds the %independent_bits_engine object with the given
|
|
* seed sequence.
|
|
* @param __q A seed generator function.
|
|
*/
|
|
template<typename _Sseq>
|
|
void
|
|
seed(_Sseq& __q)
|
|
{ _M_b.seed(__q); }
|
|
|
|
/**
|
|
* @brief Gets a const reference to the underlying generator engine
|
|
* object.
|
|
*/
|
|
const _RandomNumberEngine&
|
|
base() const
|
|
{ return _M_b; }
|
|
|
|
/**
|
|
* @brief Gets the minimum value in the generated random number range.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return 0U; }
|
|
|
|
/**
|
|
* @brief Gets the maximum value in the generated random number range.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return __detail::_Shift<_UIntType, __w>::__value - 1; }
|
|
|
|
/**
|
|
* @brief Discard a sequence of random numbers.
|
|
*
|
|
* @todo Look for a faster way to do discard.
|
|
*/
|
|
void
|
|
discard(unsigned long long __z)
|
|
{
|
|
for (; __z != 0ULL; --__z)
|
|
(*this)();
|
|
}
|
|
|
|
/**
|
|
* @brief Gets the next value in the generated random number sequence.
|
|
*/
|
|
result_type
|
|
operator()();
|
|
|
|
/**
|
|
* @brief Compares two %independent_bits_engine random number generator
|
|
* objects of the same type for equality.
|
|
*
|
|
* @param __lhs A %independent_bits_engine random number generator
|
|
* object.
|
|
* @param __rhs Another %independent_bits_engine random number generator
|
|
* object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be equal, false otherwise.
|
|
*/
|
|
friend bool
|
|
operator==(const independent_bits_engine& __lhs,
|
|
const independent_bits_engine& __rhs)
|
|
{ return __lhs._M_b == __rhs._M_b; }
|
|
|
|
/**
|
|
* @brief Extracts the current state of a % subtract_with_carry_engine
|
|
* random number generator engine @p __x from the input stream
|
|
* @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %independent_bits_engine random number generator
|
|
* engine.
|
|
*
|
|
* @returns The input stream with the state of @p __x extracted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>& __is,
|
|
std::independent_bits_engine<_RandomNumberEngine,
|
|
__w, _UIntType>& __x)
|
|
{
|
|
__is >> __x._M_b;
|
|
return __is;
|
|
}
|
|
|
|
private:
|
|
_RandomNumberEngine _M_b;
|
|
};
|
|
|
|
/**
|
|
* @brief Compares two %independent_bits_engine random number generator
|
|
* objects of the same type for inequality.
|
|
*
|
|
* @param __lhs A %independent_bits_engine random number generator
|
|
* object.
|
|
* @param __rhs Another %independent_bits_engine random number generator
|
|
* object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be different, false otherwise.
|
|
*/
|
|
template<typename _RandomNumberEngine, size_t __w, typename _UIntType>
|
|
inline bool
|
|
operator!=(const std::independent_bits_engine<_RandomNumberEngine, __w,
|
|
_UIntType>& __lhs,
|
|
const std::independent_bits_engine<_RandomNumberEngine, __w,
|
|
_UIntType>& __rhs)
|
|
{ return !(__lhs == __rhs); }
|
|
|
|
/**
|
|
* @brief Inserts the current state of a %independent_bits_engine random
|
|
* number generator engine @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %independent_bits_engine random number generator engine.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RandomNumberEngine, size_t __w, typename _UIntType,
|
|
typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>& __os,
|
|
const std::independent_bits_engine<_RandomNumberEngine,
|
|
__w, _UIntType>& __x)
|
|
{
|
|
__os << __x.base();
|
|
return __os;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Produces random numbers by combining random numbers from some
|
|
* base engine to produce random numbers with a specifies number of bits
|
|
* @p __w.
|
|
*/
|
|
template<typename _RandomNumberEngine, size_t __k>
|
|
class shuffle_order_engine
|
|
{
|
|
static_assert(1u <= __k, "template argument substituting "
|
|
"__k out of bound");
|
|
|
|
public:
|
|
/** The type of the generated random value. */
|
|
typedef typename _RandomNumberEngine::result_type result_type;
|
|
|
|
static const size_t table_size = __k;
|
|
|
|
/**
|
|
* @brief Constructs a default %shuffle_order_engine engine.
|
|
*
|
|
* The underlying engine is default constructed as well.
|
|
*/
|
|
shuffle_order_engine()
|
|
: _M_b()
|
|
{ _M_initialize(); }
|
|
|
|
/**
|
|
* @brief Copy constructs a %shuffle_order_engine engine.
|
|
*
|
|
* Copies an existing base class random number generator.
|
|
* @param rng An existing (base class) engine object.
|
|
*/
|
|
explicit
|
|
shuffle_order_engine(const _RandomNumberEngine& __rne)
|
|
: _M_b(__rne)
|
|
{ _M_initialize(); }
|
|
|
|
/**
|
|
* @brief Move constructs a %shuffle_order_engine engine.
|
|
*
|
|
* Copies an existing base class random number generator.
|
|
* @param rng An existing (base class) engine object.
|
|
*/
|
|
explicit
|
|
shuffle_order_engine(_RandomNumberEngine&& __rne)
|
|
: _M_b(std::move(__rne))
|
|
{ _M_initialize(); }
|
|
|
|
/**
|
|
* @brief Seed constructs a %shuffle_order_engine engine.
|
|
*
|
|
* Constructs the underlying generator engine seeded with @p __s.
|
|
* @param __s A seed value for the base class engine.
|
|
*/
|
|
explicit
|
|
shuffle_order_engine(result_type __s)
|
|
: _M_b(__s)
|
|
{ _M_initialize(); }
|
|
|
|
/**
|
|
* @brief Generator construct a %shuffle_order_engine engine.
|
|
*
|
|
* @param __q A seed sequence.
|
|
*/
|
|
template<typename _Sseq, typename = typename
|
|
std::enable_if<!std::is_same<_Sseq, shuffle_order_engine>::value
|
|
&& !std::is_same<_Sseq, _RandomNumberEngine>::value>
|
|
::type>
|
|
explicit
|
|
shuffle_order_engine(_Sseq& __q)
|
|
: _M_b(__q)
|
|
{ _M_initialize(); }
|
|
|
|
/**
|
|
* @brief Reseeds the %shuffle_order_engine object with the default seed
|
|
for the underlying base class generator engine.
|
|
*/
|
|
void
|
|
seed()
|
|
{
|
|
_M_b.seed();
|
|
_M_initialize();
|
|
}
|
|
|
|
/**
|
|
* @brief Reseeds the %shuffle_order_engine object with the default seed
|
|
* for the underlying base class generator engine.
|
|
*/
|
|
void
|
|
seed(result_type __s)
|
|
{
|
|
_M_b.seed(__s);
|
|
_M_initialize();
|
|
}
|
|
|
|
/**
|
|
* @brief Reseeds the %shuffle_order_engine object with the given seed
|
|
* sequence.
|
|
* @param __q A seed generator function.
|
|
*/
|
|
template<typename _Sseq>
|
|
void
|
|
seed(_Sseq& __q)
|
|
{
|
|
_M_b.seed(__q);
|
|
_M_initialize();
|
|
}
|
|
|
|
/**
|
|
* Gets a const reference to the underlying generator engine object.
|
|
*/
|
|
const _RandomNumberEngine&
|
|
base() const
|
|
{ return _M_b; }
|
|
|
|
/**
|
|
* Gets the minimum value in the generated random number range.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return _M_b.min(); }
|
|
|
|
/**
|
|
* Gets the maximum value in the generated random number range.
|
|
*
|
|
* @todo This should be constexpr.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return _M_b.max(); }
|
|
|
|
/**
|
|
* Discard a sequence of random numbers.
|
|
*
|
|
* @todo Look for a faster way to do discard.
|
|
*/
|
|
void
|
|
discard(unsigned long long __z)
|
|
{
|
|
for (; __z != 0ULL; --__z)
|
|
(*this)();
|
|
}
|
|
|
|
/**
|
|
* Gets the next value in the generated random number sequence.
|
|
*/
|
|
result_type
|
|
operator()();
|
|
|
|
/**
|
|
* Compares two %shuffle_order_engine random number generator objects
|
|
* of the same type for equality.
|
|
*
|
|
* @param __lhs A %shuffle_order_engine random number generator object.
|
|
* @param __rhs Another %shuffle_order_engine random number generator
|
|
* object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be equal, false otherwise.
|
|
*/
|
|
friend bool
|
|
operator==(const shuffle_order_engine& __lhs,
|
|
const shuffle_order_engine& __rhs)
|
|
{ return __lhs._M_b == __rhs._M_b; }
|
|
|
|
/**
|
|
* @brief Inserts the current state of a %shuffle_order_engine random
|
|
* number generator engine @p __x into the output stream
|
|
@p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %shuffle_order_engine random number generator engine.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RandomNumberEngine1, size_t __k1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::shuffle_order_engine<_RandomNumberEngine1,
|
|
__k1>&);
|
|
|
|
/**
|
|
* @brief Extracts the current state of a % subtract_with_carry_engine
|
|
* random number generator engine @p __x from the input stream
|
|
* @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %shuffle_order_engine random number generator engine.
|
|
*
|
|
* @returns The input stream with the state of @p __x extracted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RandomNumberEngine1, size_t __k1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::shuffle_order_engine<_RandomNumberEngine1, __k1>&);
|
|
|
|
private:
|
|
void _M_initialize()
|
|
{
|
|
for (size_t __i = 0; __i < __k; ++__i)
|
|
_M_v[__i] = _M_b();
|
|
_M_y = _M_b();
|
|
}
|
|
|
|
_RandomNumberEngine _M_b;
|
|
result_type _M_v[__k];
|
|
result_type _M_y;
|
|
};
|
|
|
|
/**
|
|
* Compares two %shuffle_order_engine random number generator objects
|
|
* of the same type for inequality.
|
|
*
|
|
* @param __lhs A %shuffle_order_engine random number generator object.
|
|
* @param __rhs Another %shuffle_order_engine random number generator
|
|
* object.
|
|
*
|
|
* @returns true if the infinite sequences of generated values
|
|
* would be different, false otherwise.
|
|
*/
|
|
template<typename _RandomNumberEngine, size_t __k>
|
|
inline bool
|
|
operator!=(const std::shuffle_order_engine<_RandomNumberEngine,
|
|
__k>& __lhs,
|
|
const std::shuffle_order_engine<_RandomNumberEngine,
|
|
__k>& __rhs)
|
|
{ return !(__lhs == __rhs); }
|
|
|
|
|
|
/**
|
|
* The classic Minimum Standard rand0 of Lewis, Goodman, and Miller.
|
|
*/
|
|
typedef linear_congruential_engine<uint_fast32_t, 16807UL, 0UL, 2147483647UL>
|
|
minstd_rand0;
|
|
|
|
/**
|
|
* An alternative LCR (Lehmer Generator function).
|
|
*/
|
|
typedef linear_congruential_engine<uint_fast32_t, 48271UL, 0UL, 2147483647UL>
|
|
minstd_rand;
|
|
|
|
/**
|
|
* The classic Mersenne Twister.
|
|
*
|
|
* Reference:
|
|
* M. Matsumoto and T. Nishimura, Mersenne Twister: A 623-Dimensionally
|
|
* Equidistributed Uniform Pseudo-Random Number Generator, ACM Transactions
|
|
* on Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3-30.
|
|
*/
|
|
typedef mersenne_twister_engine<
|
|
uint_fast32_t,
|
|
32, 624, 397, 31,
|
|
0x9908b0dfUL, 11,
|
|
0xffffffffUL, 7,
|
|
0x9d2c5680UL, 15,
|
|
0xefc60000UL, 18, 1812433253UL> mt19937;
|
|
|
|
/**
|
|
* An alternative Mersenne Twister.
|
|
*/
|
|
typedef mersenne_twister_engine<
|
|
uint_fast64_t,
|
|
64, 312, 156, 31,
|
|
0xb5026f5aa96619e9ULL, 29,
|
|
0x5555555555555555ULL, 17,
|
|
0x71d67fffeda60000ULL, 37,
|
|
0xfff7eee000000000ULL, 43,
|
|
6364136223846793005ULL> mt19937_64;
|
|
|
|
typedef subtract_with_carry_engine<uint_fast32_t, 24, 10, 24>
|
|
ranlux24_base;
|
|
|
|
typedef subtract_with_carry_engine<uint_fast64_t, 48, 5, 12>
|
|
ranlux48_base;
|
|
|
|
typedef discard_block_engine<ranlux24_base, 223, 23> ranlux24;
|
|
|
|
typedef discard_block_engine<ranlux48_base, 389, 11> ranlux48;
|
|
|
|
typedef shuffle_order_engine<minstd_rand0, 256> knuth_b;
|
|
|
|
typedef minstd_rand0 default_random_engine;
|
|
|
|
/**
|
|
* A standard interface to a platform-specific non-deterministic
|
|
* random number generator (if any are available).
|
|
*/
|
|
class random_device
|
|
{
|
|
public:
|
|
/** The type of the generated random value. */
|
|
typedef unsigned int result_type;
|
|
|
|
// constructors, destructors and member functions
|
|
|
|
#ifdef _GLIBCXX_USE_RANDOM_TR1
|
|
|
|
explicit
|
|
random_device(const std::string& __token = "/dev/urandom")
|
|
{
|
|
if ((__token != "/dev/urandom" && __token != "/dev/random")
|
|
|| !(_M_file = std::fopen(__token.c_str(), "rb")))
|
|
std::__throw_runtime_error(__N("random_device::"
|
|
"random_device(const std::string&)"));
|
|
}
|
|
|
|
~random_device()
|
|
{ std::fclose(_M_file); }
|
|
|
|
#else
|
|
|
|
explicit
|
|
random_device(const std::string& __token = "mt19937")
|
|
: _M_mt(_M_strtoul(__token)) { }
|
|
|
|
private:
|
|
static unsigned long
|
|
_M_strtoul(const std::string& __str)
|
|
{
|
|
unsigned long __ret = 5489UL;
|
|
if (__str != "mt19937")
|
|
{
|
|
const char* __nptr = __str.c_str();
|
|
char* __endptr;
|
|
__ret = std::strtoul(__nptr, &__endptr, 0);
|
|
if (*__nptr == '\0' || *__endptr != '\0')
|
|
std::__throw_runtime_error(__N("random_device::_M_strtoul"
|
|
"(const std::string&)"));
|
|
}
|
|
return __ret;
|
|
}
|
|
|
|
public:
|
|
|
|
#endif
|
|
|
|
result_type
|
|
min() const
|
|
{ return std::numeric_limits<result_type>::min(); }
|
|
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
double
|
|
entropy() const
|
|
{ return 0.0; }
|
|
|
|
result_type
|
|
operator()()
|
|
{
|
|
#ifdef _GLIBCXX_USE_RANDOM_TR1
|
|
result_type __ret;
|
|
std::fread(reinterpret_cast<void*>(&__ret), sizeof(result_type),
|
|
1, _M_file);
|
|
return __ret;
|
|
#else
|
|
return _M_mt();
|
|
#endif
|
|
}
|
|
|
|
// No copy functions.
|
|
random_device(const random_device&) = delete;
|
|
void operator=(const random_device&) = delete;
|
|
|
|
private:
|
|
|
|
#ifdef _GLIBCXX_USE_RANDOM_TR1
|
|
FILE* _M_file;
|
|
#else
|
|
mt19937 _M_mt;
|
|
#endif
|
|
};
|
|
|
|
/* @} */ // group random_generators
|
|
|
|
/**
|
|
* @addtogroup random_distributions Random Number Distributions
|
|
* @ingroup random
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup random_distributions_uniform Uniform
|
|
* @ingroup random_distributions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Uniform discrete distribution for random numbers.
|
|
* A discrete random distribution on the range @f$[min, max]@f$ with equal
|
|
* probability throughout the range.
|
|
*/
|
|
template<typename _IntType = int>
|
|
class uniform_int_distribution
|
|
{
|
|
static_assert(std::is_integral<_IntType>::value,
|
|
"template argument not an integral type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _IntType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef uniform_int_distribution<_IntType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_IntType __a = 0,
|
|
_IntType __b = std::numeric_limits<_IntType>::max())
|
|
: _M_a(__a), _M_b(__b)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT(_M_a <= _M_b);
|
|
}
|
|
|
|
result_type
|
|
a() const
|
|
{ return _M_a; }
|
|
|
|
result_type
|
|
b() const
|
|
{ return _M_b; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_a == __p2._M_a && __p1._M_b == __p2._M_b; }
|
|
|
|
private:
|
|
_IntType _M_a;
|
|
_IntType _M_b;
|
|
};
|
|
|
|
public:
|
|
/**
|
|
* @brief Constructs a uniform distribution object.
|
|
*/
|
|
explicit
|
|
uniform_int_distribution(_IntType __a = 0,
|
|
_IntType __b = std::numeric_limits<_IntType>::max())
|
|
: _M_param(__a, __b)
|
|
{ }
|
|
|
|
explicit
|
|
uniform_int_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*
|
|
* Does nothing for the uniform integer distribution.
|
|
*/
|
|
void
|
|
reset() { }
|
|
|
|
result_type
|
|
a() const
|
|
{ return _M_param.a(); }
|
|
|
|
result_type
|
|
b() const
|
|
{ return _M_param.b(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the inclusive lower bound of the distribution range.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return this->a(); }
|
|
|
|
/**
|
|
* @brief Returns the inclusive upper bound of the distribution range.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return this->b(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two uniform integer distributions have
|
|
* the same parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator==(const std::uniform_int_distribution<_IntType>& __d1,
|
|
const std::uniform_int_distribution<_IntType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two uniform integer distributions have
|
|
* different parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator!=(const std::uniform_int_distribution<_IntType>& __d1,
|
|
const std::uniform_int_distribution<_IntType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %uniform_int_distribution random number
|
|
* distribution @p __x into the output stream @p os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %uniform_int_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _IntType, typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::uniform_int_distribution<_IntType>&);
|
|
|
|
/**
|
|
* @brief Extracts a %uniform_int_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %uniform_int_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _IntType, typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::uniform_int_distribution<_IntType>&);
|
|
|
|
|
|
/**
|
|
* @brief Uniform continuous distribution for random numbers.
|
|
*
|
|
* A continuous random distribution on the range [min, max) with equal
|
|
* probability throughout the range. The URNG should be real-valued and
|
|
* deliver number in the range [0, 1).
|
|
*/
|
|
template<typename _RealType = double>
|
|
class uniform_real_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef uniform_real_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __a = _RealType(0),
|
|
_RealType __b = _RealType(1))
|
|
: _M_a(__a), _M_b(__b)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT(_M_a <= _M_b);
|
|
}
|
|
|
|
result_type
|
|
a() const
|
|
{ return _M_a; }
|
|
|
|
result_type
|
|
b() const
|
|
{ return _M_b; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_a == __p2._M_a && __p1._M_b == __p2._M_b; }
|
|
|
|
private:
|
|
_RealType _M_a;
|
|
_RealType _M_b;
|
|
};
|
|
|
|
public:
|
|
/**
|
|
* @brief Constructs a uniform_real_distribution object.
|
|
*
|
|
* @param __min [IN] The lower bound of the distribution.
|
|
* @param __max [IN] The upper bound of the distribution.
|
|
*/
|
|
explicit
|
|
uniform_real_distribution(_RealType __a = _RealType(0),
|
|
_RealType __b = _RealType(1))
|
|
: _M_param(__a, __b)
|
|
{ }
|
|
|
|
explicit
|
|
uniform_real_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*
|
|
* Does nothing for the uniform real distribution.
|
|
*/
|
|
void
|
|
reset() { }
|
|
|
|
result_type
|
|
a() const
|
|
{ return _M_param.a(); }
|
|
|
|
result_type
|
|
b() const
|
|
{ return _M_param.b(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the inclusive lower bound of the distribution range.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return this->a(); }
|
|
|
|
/**
|
|
* @brief Returns the inclusive upper bound of the distribution range.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return this->b(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p)
|
|
{
|
|
__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
|
|
__aurng(__urng);
|
|
return (__aurng() * (__p.b() - __p.a())) + __p.a();
|
|
}
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two uniform real distributions have
|
|
* the same parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator==(const std::uniform_real_distribution<_IntType>& __d1,
|
|
const std::uniform_real_distribution<_IntType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two uniform real distributions have
|
|
* different parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator!=(const std::uniform_real_distribution<_IntType>& __d1,
|
|
const std::uniform_real_distribution<_IntType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %uniform_real_distribution random number
|
|
* distribution @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %uniform_real_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::uniform_real_distribution<_RealType>&);
|
|
|
|
/**
|
|
* @brief Extracts a %uniform_real_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %uniform_real_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::uniform_real_distribution<_RealType>&);
|
|
|
|
/* @} */ // group random_distributions_uniform
|
|
|
|
/**
|
|
* @addtogroup random_distributions_normal Normal
|
|
* @ingroup random_distributions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief A normal continuous distribution for random numbers.
|
|
*
|
|
* The formula for the normal probability density function is
|
|
* @f[
|
|
* p(x|\mu,\sigma) = \frac{1}{\sigma \sqrt{2 \pi}}
|
|
* e^{- \frac{{x - \mu}^ {2}}{2 \sigma ^ {2}} }
|
|
* @f]
|
|
*/
|
|
template<typename _RealType = double>
|
|
class normal_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef normal_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __mean = _RealType(0),
|
|
_RealType __stddev = _RealType(1))
|
|
: _M_mean(__mean), _M_stddev(__stddev)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT(_M_stddev > _RealType(0));
|
|
}
|
|
|
|
_RealType
|
|
mean() const
|
|
{ return _M_mean; }
|
|
|
|
_RealType
|
|
stddev() const
|
|
{ return _M_stddev; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return (__p1._M_mean == __p2._M_mean
|
|
&& __p1._M_stddev == __p2._M_stddev); }
|
|
|
|
private:
|
|
_RealType _M_mean;
|
|
_RealType _M_stddev;
|
|
};
|
|
|
|
public:
|
|
/**
|
|
* Constructs a normal distribution with parameters @f$mean@f$ and
|
|
* standard deviation.
|
|
*/
|
|
explicit
|
|
normal_distribution(result_type __mean = result_type(0),
|
|
result_type __stddev = result_type(1))
|
|
: _M_param(__mean, __stddev), _M_saved_available(false)
|
|
{ }
|
|
|
|
explicit
|
|
normal_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_saved_available(false)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ _M_saved_available = false; }
|
|
|
|
/**
|
|
* @brief Returns the mean of the distribution.
|
|
*/
|
|
_RealType
|
|
mean() const
|
|
{ return _M_param.mean(); }
|
|
|
|
/**
|
|
* @brief Returns the standard deviation of the distribution.
|
|
*/
|
|
_RealType
|
|
stddev() const
|
|
{ return _M_param.stddev(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return std::numeric_limits<result_type>::min(); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Return true if two normal distributions have
|
|
* the same parameters and the sequences that would
|
|
* be generated are equal.
|
|
*/
|
|
template<typename _RealType1>
|
|
friend bool
|
|
operator==(const std::normal_distribution<_RealType1>& __d1,
|
|
const std::normal_distribution<_RealType1>& __d2);
|
|
|
|
/**
|
|
* @brief Inserts a %normal_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %normal_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::normal_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %normal_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %normal_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error
|
|
* state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::normal_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
result_type _M_saved;
|
|
bool _M_saved_available;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two normal distributions are different.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::normal_distribution<_RealType>& __d1,
|
|
const std::normal_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief A lognormal_distribution random number distribution.
|
|
*
|
|
* The formula for the normal probability mass function is
|
|
* @f[
|
|
* p(x|m,s) = \frac{1}{sx\sqrt{2\pi}}
|
|
* \exp{-\frac{(\ln{x} - m)^2}{2s^2}}
|
|
* @f]
|
|
*/
|
|
template<typename _RealType = double>
|
|
class lognormal_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef lognormal_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __m = _RealType(0),
|
|
_RealType __s = _RealType(1))
|
|
: _M_m(__m), _M_s(__s)
|
|
{ }
|
|
|
|
_RealType
|
|
m() const
|
|
{ return _M_m; }
|
|
|
|
_RealType
|
|
s() const
|
|
{ return _M_s; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_m == __p2._M_m && __p1._M_s == __p2._M_s; }
|
|
|
|
private:
|
|
_RealType _M_m;
|
|
_RealType _M_s;
|
|
};
|
|
|
|
explicit
|
|
lognormal_distribution(_RealType __m = _RealType(0),
|
|
_RealType __s = _RealType(1))
|
|
: _M_param(__m, __s), _M_nd()
|
|
{ }
|
|
|
|
explicit
|
|
lognormal_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_nd()
|
|
{ }
|
|
|
|
/**
|
|
* Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ _M_nd.reset(); }
|
|
|
|
/**
|
|
*
|
|
*/
|
|
_RealType
|
|
m() const
|
|
{ return _M_param.m(); }
|
|
|
|
_RealType
|
|
s() const
|
|
{ return _M_param.s(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p)
|
|
{ return std::exp(__p.s() * _M_nd(__urng) + __p.m()); }
|
|
|
|
/**
|
|
* @brief Return true if two lognormal distributions have
|
|
* the same parameters and the sequences that would
|
|
* be generated are equal.
|
|
*/
|
|
template<typename _RealType1>
|
|
friend bool
|
|
operator==(const std::lognormal_distribution<_RealType1>& __d1,
|
|
const std::lognormal_distribution<_RealType1>& __d2)
|
|
{ return (__d1.param() == __d2.param()
|
|
&& __d1._M_nd == __d2._M_nd); }
|
|
|
|
/**
|
|
* @brief Inserts a %lognormal_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %lognormal_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::lognormal_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %lognormal_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %lognormal_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::lognormal_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
|
|
std::normal_distribution<result_type> _M_nd;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two lognormal distributions are different.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::lognormal_distribution<_RealType>& __d1,
|
|
const std::lognormal_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief A gamma continuous distribution for random numbers.
|
|
*
|
|
* The formula for the gamma probability density function is:
|
|
* @f[
|
|
* p(x|\alpha,\beta) = \frac{1}{\beta\Gamma(\alpha)}
|
|
* (x/\beta)^{\alpha - 1} e^{-x/\beta}
|
|
* @f]
|
|
*/
|
|
template<typename _RealType = double>
|
|
class gamma_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef gamma_distribution<_RealType> distribution_type;
|
|
friend class gamma_distribution<_RealType>;
|
|
|
|
explicit
|
|
param_type(_RealType __alpha_val = _RealType(1),
|
|
_RealType __beta_val = _RealType(1))
|
|
: _M_alpha(__alpha_val), _M_beta(__beta_val)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT(_M_alpha > _RealType(0));
|
|
_M_initialize();
|
|
}
|
|
|
|
_RealType
|
|
alpha() const
|
|
{ return _M_alpha; }
|
|
|
|
_RealType
|
|
beta() const
|
|
{ return _M_beta; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return (__p1._M_alpha == __p2._M_alpha
|
|
&& __p1._M_beta == __p2._M_beta); }
|
|
|
|
private:
|
|
void
|
|
_M_initialize();
|
|
|
|
_RealType _M_alpha;
|
|
_RealType _M_beta;
|
|
|
|
_RealType _M_malpha, _M_a2;
|
|
};
|
|
|
|
public:
|
|
/**
|
|
* @brief Constructs a gamma distribution with parameters
|
|
* @f$\alpha@f$ and @f$\beta@f$.
|
|
*/
|
|
explicit
|
|
gamma_distribution(_RealType __alpha_val = _RealType(1),
|
|
_RealType __beta_val = _RealType(1))
|
|
: _M_param(__alpha_val, __beta_val), _M_nd()
|
|
{ }
|
|
|
|
explicit
|
|
gamma_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_nd()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ _M_nd.reset(); }
|
|
|
|
/**
|
|
* @brief Returns the @f$\alpha@f$ of the distribution.
|
|
*/
|
|
_RealType
|
|
alpha() const
|
|
{ return _M_param.alpha(); }
|
|
|
|
/**
|
|
* @brief Returns the @f$\beta@f$ of the distribution.
|
|
*/
|
|
_RealType
|
|
beta() const
|
|
{ return _M_param.beta(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Return true if two gamma distributions have the same
|
|
* parameters and the sequences that would be generated
|
|
* are equal.
|
|
*/
|
|
template<typename _RealType1>
|
|
friend bool
|
|
operator==(const std::gamma_distribution<_RealType1>& __d1,
|
|
const std::gamma_distribution<_RealType1>& __d2)
|
|
{ return (__d1.param() == __d2.param()
|
|
&& __d1._M_nd == __d2._M_nd); }
|
|
|
|
/**
|
|
* @brief Inserts a %gamma_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %gamma_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::gamma_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %gamma_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %gamma_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::gamma_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
|
|
std::normal_distribution<result_type> _M_nd;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two gamma distributions are different.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::gamma_distribution<_RealType>& __d1,
|
|
const std::gamma_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief A chi_squared_distribution random number distribution.
|
|
*
|
|
* The formula for the normal probability mass function is
|
|
* @f$p(x|n) = \frac{x^{(n/2) - 1}e^{-x/2}}{\Gamma(n/2) 2^{n/2}}@f$
|
|
*/
|
|
template<typename _RealType = double>
|
|
class chi_squared_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef chi_squared_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __n = _RealType(1))
|
|
: _M_n(__n)
|
|
{ }
|
|
|
|
_RealType
|
|
n() const
|
|
{ return _M_n; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_n == __p2._M_n; }
|
|
|
|
private:
|
|
_RealType _M_n;
|
|
};
|
|
|
|
explicit
|
|
chi_squared_distribution(_RealType __n = _RealType(1))
|
|
: _M_param(__n), _M_gd(__n / 2)
|
|
{ }
|
|
|
|
explicit
|
|
chi_squared_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_gd(__p.n() / 2)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ _M_gd.reset(); }
|
|
|
|
/**
|
|
*
|
|
*/
|
|
_RealType
|
|
n() const
|
|
{ return _M_param.n(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return 2 * _M_gd(__urng); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p)
|
|
{
|
|
typedef typename std::gamma_distribution<result_type>::param_type
|
|
param_type;
|
|
return 2 * _M_gd(__urng, param_type(__p.n() / 2));
|
|
}
|
|
|
|
/**
|
|
* @brief Return true if two Chi-squared distributions have
|
|
* the same parameters and the sequences that would be
|
|
* generated are equal.
|
|
*/
|
|
template<typename _RealType1>
|
|
friend bool
|
|
operator==(const std::chi_squared_distribution<_RealType1>& __d1,
|
|
const std::chi_squared_distribution<_RealType1>& __d2)
|
|
{ return __d1.param() == __d2.param() && __d1._M_gd == __d2._M_gd; }
|
|
|
|
/**
|
|
* @brief Inserts a %chi_squared_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %chi_squared_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::chi_squared_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %chi_squared_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %chi_squared_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::chi_squared_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
|
|
std::gamma_distribution<result_type> _M_gd;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two Chi-squared distributions are different.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::chi_squared_distribution<_RealType>& __d1,
|
|
const std::chi_squared_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief A cauchy_distribution random number distribution.
|
|
*
|
|
* The formula for the normal probability mass function is
|
|
* @f$p(x|a,b) = (\pi b (1 + (\frac{x-a}{b})^2))^{-1}@f$
|
|
*/
|
|
template<typename _RealType = double>
|
|
class cauchy_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef cauchy_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __a = _RealType(0),
|
|
_RealType __b = _RealType(1))
|
|
: _M_a(__a), _M_b(__b)
|
|
{ }
|
|
|
|
_RealType
|
|
a() const
|
|
{ return _M_a; }
|
|
|
|
_RealType
|
|
b() const
|
|
{ return _M_b; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_a == __p2._M_a && __p1._M_b == __p2._M_b; }
|
|
|
|
private:
|
|
_RealType _M_a;
|
|
_RealType _M_b;
|
|
};
|
|
|
|
explicit
|
|
cauchy_distribution(_RealType __a = _RealType(0),
|
|
_RealType __b = _RealType(1))
|
|
: _M_param(__a, __b)
|
|
{ }
|
|
|
|
explicit
|
|
cauchy_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ }
|
|
|
|
/**
|
|
*
|
|
*/
|
|
_RealType
|
|
a() const
|
|
{ return _M_param.a(); }
|
|
|
|
_RealType
|
|
b() const
|
|
{ return _M_param.b(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return std::numeric_limits<result_type>::min(); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two Cauchy distributions have
|
|
* the same parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator==(const std::cauchy_distribution<_RealType>& __d1,
|
|
const std::cauchy_distribution<_RealType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two Cauchy distributions have
|
|
* different parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::cauchy_distribution<_RealType>& __d1,
|
|
const std::cauchy_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %cauchy_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %cauchy_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::cauchy_distribution<_RealType>&);
|
|
|
|
/**
|
|
* @brief Extracts a %cauchy_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %cauchy_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::cauchy_distribution<_RealType>&);
|
|
|
|
|
|
/**
|
|
* @brief A fisher_f_distribution random number distribution.
|
|
*
|
|
* The formula for the normal probability mass function is
|
|
* @f[
|
|
* p(x|m,n) = \frac{\Gamma((m+n)/2)}{\Gamma(m/2)\Gamma(n/2)}
|
|
* (\frac{m}{n})^{m/2} x^{(m/2)-1}
|
|
* (1 + \frac{mx}{n})^{-(m+n)/2}
|
|
* @f]
|
|
*/
|
|
template<typename _RealType = double>
|
|
class fisher_f_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef fisher_f_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __m = _RealType(1),
|
|
_RealType __n = _RealType(1))
|
|
: _M_m(__m), _M_n(__n)
|
|
{ }
|
|
|
|
_RealType
|
|
m() const
|
|
{ return _M_m; }
|
|
|
|
_RealType
|
|
n() const
|
|
{ return _M_n; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_m == __p2._M_m && __p1._M_n == __p2._M_n; }
|
|
|
|
private:
|
|
_RealType _M_m;
|
|
_RealType _M_n;
|
|
};
|
|
|
|
explicit
|
|
fisher_f_distribution(_RealType __m = _RealType(1),
|
|
_RealType __n = _RealType(1))
|
|
: _M_param(__m, __n), _M_gd_x(__m / 2), _M_gd_y(__n / 2)
|
|
{ }
|
|
|
|
explicit
|
|
fisher_f_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_gd_x(__p.m() / 2), _M_gd_y(__p.n() / 2)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{
|
|
_M_gd_x.reset();
|
|
_M_gd_y.reset();
|
|
}
|
|
|
|
/**
|
|
*
|
|
*/
|
|
_RealType
|
|
m() const
|
|
{ return _M_param.m(); }
|
|
|
|
_RealType
|
|
n() const
|
|
{ return _M_param.n(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return (_M_gd_x(__urng) * n()) / (_M_gd_y(__urng) * m()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p)
|
|
{
|
|
typedef typename std::gamma_distribution<result_type>::param_type
|
|
param_type;
|
|
return ((_M_gd_x(__urng, param_type(__p.m() / 2)) * n())
|
|
/ (_M_gd_y(__urng, param_type(__p.n() / 2)) * m()));
|
|
}
|
|
|
|
/**
|
|
* @brief Return true if two Fisher f distributions have
|
|
* the same parameters and the sequences that would
|
|
* be generated are equal.
|
|
*/
|
|
template<typename _RealType1>
|
|
friend bool
|
|
operator==(const std::fisher_f_distribution<_RealType1>& __d1,
|
|
const std::fisher_f_distribution<_RealType1>& __d2)
|
|
{ return (__d1.param() == __d2.param()
|
|
&& __d1._M_gd_x == __d2._M_gd_x
|
|
&& __d1._M_gd_y == __d2._M_gd_y); }
|
|
|
|
/**
|
|
* @brief Inserts a %fisher_f_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %fisher_f_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::fisher_f_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %fisher_f_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %fisher_f_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::fisher_f_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
|
|
std::gamma_distribution<result_type> _M_gd_x, _M_gd_y;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two Fisher f distributions are diferent.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::fisher_f_distribution<_RealType>& __d1,
|
|
const std::fisher_f_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief A student_t_distribution random number distribution.
|
|
*
|
|
* The formula for the normal probability mass function is:
|
|
* @f[
|
|
* p(x|n) = \frac{1}{\sqrt(n\pi)} \frac{\Gamma((n+1)/2)}{\Gamma(n/2)}
|
|
* (1 + \frac{x^2}{n}) ^{-(n+1)/2}
|
|
* @f]
|
|
*/
|
|
template<typename _RealType = double>
|
|
class student_t_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef student_t_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __n = _RealType(1))
|
|
: _M_n(__n)
|
|
{ }
|
|
|
|
_RealType
|
|
n() const
|
|
{ return _M_n; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_n == __p2._M_n; }
|
|
|
|
private:
|
|
_RealType _M_n;
|
|
};
|
|
|
|
explicit
|
|
student_t_distribution(_RealType __n = _RealType(1))
|
|
: _M_param(__n), _M_nd(), _M_gd(__n / 2, 2)
|
|
{ }
|
|
|
|
explicit
|
|
student_t_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_nd(), _M_gd(__p.n() / 2, 2)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{
|
|
_M_nd.reset();
|
|
_M_gd.reset();
|
|
}
|
|
|
|
/**
|
|
*
|
|
*/
|
|
_RealType
|
|
n() const
|
|
{ return _M_param.n(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return std::numeric_limits<result_type>::min(); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return _M_nd(__urng) * std::sqrt(n() / _M_gd(__urng)); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p)
|
|
{
|
|
typedef typename std::gamma_distribution<result_type>::param_type
|
|
param_type;
|
|
|
|
const result_type __g = _M_gd(__urng, param_type(__p.n() / 2, 2));
|
|
return _M_nd(__urng) * std::sqrt(__p.n() / __g);
|
|
}
|
|
|
|
/**
|
|
* @brief Return true if two Student t distributions have
|
|
* the same parameters and the sequences that would
|
|
* be generated are equal.
|
|
*/
|
|
template<typename _RealType1>
|
|
friend bool
|
|
operator==(const std::student_t_distribution<_RealType1>& __d1,
|
|
const std::student_t_distribution<_RealType1>& __d2)
|
|
{ return (__d1.param() == __d2.param()
|
|
&& __d1._M_nd == __d2._M_nd && __d1._M_gd == __d2._M_gd); }
|
|
|
|
/**
|
|
* @brief Inserts a %student_t_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %student_t_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::student_t_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %student_t_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %student_t_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::student_t_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
|
|
std::normal_distribution<result_type> _M_nd;
|
|
std::gamma_distribution<result_type> _M_gd;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two Student t distributions are different.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::student_t_distribution<_RealType>& __d1,
|
|
const std::student_t_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/* @} */ // group random_distributions_normal
|
|
|
|
/**
|
|
* @addtogroup random_distributions_bernoulli Bernoulli
|
|
* @ingroup random_distributions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief A Bernoulli random number distribution.
|
|
*
|
|
* Generates a sequence of true and false values with likelihood @f$p@f$
|
|
* that true will come up and @f$(1 - p)@f$ that false will appear.
|
|
*/
|
|
class bernoulli_distribution
|
|
{
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef bool result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef bernoulli_distribution distribution_type;
|
|
|
|
explicit
|
|
param_type(double __p = 0.5)
|
|
: _M_p(__p)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT((_M_p >= 0.0) && (_M_p <= 1.0));
|
|
}
|
|
|
|
double
|
|
p() const
|
|
{ return _M_p; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_p == __p2._M_p; }
|
|
|
|
private:
|
|
double _M_p;
|
|
};
|
|
|
|
public:
|
|
/**
|
|
* @brief Constructs a Bernoulli distribution with likelihood @p p.
|
|
*
|
|
* @param __p [IN] The likelihood of a true result being returned.
|
|
* Must be in the interval @f$[0, 1]@f$.
|
|
*/
|
|
explicit
|
|
bernoulli_distribution(double __p = 0.5)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
explicit
|
|
bernoulli_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*
|
|
* Does nothing for a Bernoulli distribution.
|
|
*/
|
|
void
|
|
reset() { }
|
|
|
|
/**
|
|
* @brief Returns the @p p parameter of the distribution.
|
|
*/
|
|
double
|
|
p() const
|
|
{ return _M_param.p(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return std::numeric_limits<result_type>::min(); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p)
|
|
{
|
|
__detail::_Adaptor<_UniformRandomNumberGenerator, double>
|
|
__aurng(__urng);
|
|
if ((__aurng() - __aurng.min())
|
|
< __p.p() * (__aurng.max() - __aurng.min()))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two Bernoulli distributions have
|
|
* the same parameters.
|
|
*/
|
|
inline bool
|
|
operator==(const std::bernoulli_distribution& __d1,
|
|
const std::bernoulli_distribution& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two Bernoulli distributions have
|
|
* different parameters.
|
|
*/
|
|
inline bool
|
|
operator!=(const std::bernoulli_distribution& __d1,
|
|
const std::bernoulli_distribution& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %bernoulli_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %bernoulli_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::bernoulli_distribution&);
|
|
|
|
/**
|
|
* @brief Extracts a %bernoulli_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %bernoulli_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>& __is,
|
|
std::bernoulli_distribution& __x)
|
|
{
|
|
double __p;
|
|
__is >> __p;
|
|
__x.param(bernoulli_distribution::param_type(__p));
|
|
return __is;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief A discrete binomial random number distribution.
|
|
*
|
|
* The formula for the binomial probability density function is
|
|
* @f$p(i|t,p) = \binom{n}{i} p^i (1 - p)^{t - i}@f$ where @f$t@f$
|
|
* and @f$p@f$ are the parameters of the distribution.
|
|
*/
|
|
template<typename _IntType = int>
|
|
class binomial_distribution
|
|
{
|
|
static_assert(std::is_integral<_IntType>::value,
|
|
"template argument not an integral type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _IntType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef binomial_distribution<_IntType> distribution_type;
|
|
friend class binomial_distribution<_IntType>;
|
|
|
|
explicit
|
|
param_type(_IntType __t = _IntType(1), double __p = 0.5)
|
|
: _M_t(__t), _M_p(__p)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT((_M_t >= _IntType(0))
|
|
&& (_M_p >= 0.0)
|
|
&& (_M_p <= 1.0));
|
|
_M_initialize();
|
|
}
|
|
|
|
_IntType
|
|
t() const
|
|
{ return _M_t; }
|
|
|
|
double
|
|
p() const
|
|
{ return _M_p; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_t == __p2._M_t && __p1._M_p == __p2._M_p; }
|
|
|
|
private:
|
|
void
|
|
_M_initialize();
|
|
|
|
_IntType _M_t;
|
|
double _M_p;
|
|
|
|
double _M_q;
|
|
#if _GLIBCXX_USE_C99_MATH_TR1
|
|
double _M_d1, _M_d2, _M_s1, _M_s2, _M_c,
|
|
_M_a1, _M_a123, _M_s, _M_lf, _M_lp1p;
|
|
#endif
|
|
bool _M_easy;
|
|
};
|
|
|
|
// constructors and member function
|
|
explicit
|
|
binomial_distribution(_IntType __t = _IntType(1),
|
|
double __p = 0.5)
|
|
: _M_param(__t, __p), _M_nd()
|
|
{ }
|
|
|
|
explicit
|
|
binomial_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_nd()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ _M_nd.reset(); }
|
|
|
|
/**
|
|
* @brief Returns the distribution @p t parameter.
|
|
*/
|
|
_IntType
|
|
t() const
|
|
{ return _M_param.t(); }
|
|
|
|
/**
|
|
* @brief Returns the distribution @p p parameter.
|
|
*/
|
|
double
|
|
p() const
|
|
{ return _M_param.p(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return 0; }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return _M_param.t(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Return true if two binomial distributions have
|
|
* the same parameters and the sequences that would
|
|
* be generated are equal.
|
|
*/
|
|
template<typename _IntType1>
|
|
friend bool
|
|
operator==(const std::binomial_distribution<_IntType1>& __d1,
|
|
const std::binomial_distribution<_IntType1>& __d2)
|
|
#ifdef _GLIBCXX_USE_C99_MATH_TR1
|
|
{ return __d1.param() == __d2.param() && __d1._M_nd == __d2._M_nd; }
|
|
#else
|
|
{ return __d1.param() == __d2.param(); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Inserts a %binomial_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %binomial_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _IntType1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::binomial_distribution<_IntType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %binomial_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %binomial_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error
|
|
* state.
|
|
*/
|
|
template<typename _IntType1,
|
|
typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::binomial_distribution<_IntType1>&);
|
|
|
|
private:
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
_M_waiting(_UniformRandomNumberGenerator& __urng, _IntType __t);
|
|
|
|
param_type _M_param;
|
|
|
|
// NB: Unused when _GLIBCXX_USE_C99_MATH_TR1 is undefined.
|
|
std::normal_distribution<double> _M_nd;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two binomial distributions are different.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator!=(const std::binomial_distribution<_IntType>& __d1,
|
|
const std::binomial_distribution<_IntType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief A discrete geometric random number distribution.
|
|
*
|
|
* The formula for the geometric probability density function is
|
|
* @f$p(i|p) = (1 - p)p^{i-1}@f$ where @f$p@f$ is the parameter of the
|
|
* distribution.
|
|
*/
|
|
template<typename _IntType = int>
|
|
class geometric_distribution
|
|
{
|
|
static_assert(std::is_integral<_IntType>::value,
|
|
"template argument not an integral type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _IntType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef geometric_distribution<_IntType> distribution_type;
|
|
friend class geometric_distribution<_IntType>;
|
|
|
|
explicit
|
|
param_type(double __p = 0.5)
|
|
: _M_p(__p)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT((_M_p >= 0.0)
|
|
&& (_M_p <= 1.0));
|
|
_M_initialize();
|
|
}
|
|
|
|
double
|
|
p() const
|
|
{ return _M_p; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_p == __p2._M_p; }
|
|
|
|
private:
|
|
void
|
|
_M_initialize()
|
|
{ _M_log_p = std::log(_M_p); }
|
|
|
|
double _M_p;
|
|
|
|
double _M_log_p;
|
|
};
|
|
|
|
// constructors and member function
|
|
explicit
|
|
geometric_distribution(double __p = 0.5)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
explicit
|
|
geometric_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*
|
|
* Does nothing for the geometric distribution.
|
|
*/
|
|
void
|
|
reset() { }
|
|
|
|
/**
|
|
* @brief Returns the distribution parameter @p p.
|
|
*/
|
|
double
|
|
p() const
|
|
{ return _M_param.p(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return 0; }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two geometric distributions have
|
|
* the same parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator==(const std::geometric_distribution<_IntType>& __d1,
|
|
const std::geometric_distribution<_IntType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two geometric distributions have
|
|
* different parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator!=(const std::geometric_distribution<_IntType>& __d1,
|
|
const std::geometric_distribution<_IntType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %geometric_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %geometric_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _IntType,
|
|
typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::geometric_distribution<_IntType>&);
|
|
|
|
/**
|
|
* @brief Extracts a %geometric_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %geometric_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _IntType,
|
|
typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::geometric_distribution<_IntType>&);
|
|
|
|
|
|
/**
|
|
* @brief A negative_binomial_distribution random number distribution.
|
|
*
|
|
* The formula for the negative binomial probability mass function is
|
|
* @f$p(i) = \binom{n}{i} p^i (1 - p)^{t - i}@f$ where @f$t@f$
|
|
* and @f$p@f$ are the parameters of the distribution.
|
|
*/
|
|
template<typename _IntType = int>
|
|
class negative_binomial_distribution
|
|
{
|
|
static_assert(std::is_integral<_IntType>::value,
|
|
"template argument not an integral type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _IntType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef negative_binomial_distribution<_IntType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_IntType __k = 1, double __p = 0.5)
|
|
: _M_k(__k), _M_p(__p)
|
|
{ }
|
|
|
|
_IntType
|
|
k() const
|
|
{ return _M_k; }
|
|
|
|
double
|
|
p() const
|
|
{ return _M_p; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_k == __p2._M_k && __p1._M_p == __p2._M_p; }
|
|
|
|
private:
|
|
_IntType _M_k;
|
|
double _M_p;
|
|
};
|
|
|
|
explicit
|
|
negative_binomial_distribution(_IntType __k = 1, double __p = 0.5)
|
|
: _M_param(__k, __p), _M_gd(__k, __p / (1.0 - __p))
|
|
{ }
|
|
|
|
explicit
|
|
negative_binomial_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_gd(__p.k(), __p.p() / (1.0 - __p.p()))
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ _M_gd.reset(); }
|
|
|
|
/**
|
|
* @brief Return the @f$k@f$ parameter of the distribution.
|
|
*/
|
|
_IntType
|
|
k() const
|
|
{ return _M_param.k(); }
|
|
|
|
/**
|
|
* @brief Return the @f$p@f$ parameter of the distribution.
|
|
*/
|
|
double
|
|
p() const
|
|
{ return _M_param.p(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng);
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Return true if two negative binomial distributions have
|
|
* the same parameters and the sequences that would be
|
|
* generated are equal.
|
|
*/
|
|
template<typename _IntType1>
|
|
friend bool
|
|
operator==(const std::negative_binomial_distribution<_IntType1>& __d1,
|
|
const std::negative_binomial_distribution<_IntType1>& __d2)
|
|
{ return __d1.param() == __d2.param() && __d1._M_gd == __d2._M_gd; }
|
|
|
|
/**
|
|
* @brief Inserts a %negative_binomial_distribution random
|
|
* number distribution @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %negative_binomial_distribution random number
|
|
* distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _IntType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::negative_binomial_distribution<_IntType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %negative_binomial_distribution random number
|
|
* distribution @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %negative_binomial_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _IntType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::negative_binomial_distribution<_IntType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
|
|
std::gamma_distribution<double> _M_gd;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two negative binomial distributions are different.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator!=(const std::negative_binomial_distribution<_IntType>& __d1,
|
|
const std::negative_binomial_distribution<_IntType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/* @} */ // group random_distributions_bernoulli
|
|
|
|
/**
|
|
* @addtogroup random_distributions_poisson Poisson
|
|
* @ingroup random_distributions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief A discrete Poisson random number distribution.
|
|
*
|
|
* The formula for the Poisson probability density function is
|
|
* @f$p(i|\mu) = \frac{\mu^i}{i!} e^{-\mu}@f$ where @f$\mu@f$ is the
|
|
* parameter of the distribution.
|
|
*/
|
|
template<typename _IntType = int>
|
|
class poisson_distribution
|
|
{
|
|
static_assert(std::is_integral<_IntType>::value,
|
|
"template argument not an integral type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _IntType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef poisson_distribution<_IntType> distribution_type;
|
|
friend class poisson_distribution<_IntType>;
|
|
|
|
explicit
|
|
param_type(double __mean = 1.0)
|
|
: _M_mean(__mean)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT(_M_mean > 0.0);
|
|
_M_initialize();
|
|
}
|
|
|
|
double
|
|
mean() const
|
|
{ return _M_mean; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_mean == __p2._M_mean; }
|
|
|
|
private:
|
|
// Hosts either log(mean) or the threshold of the simple method.
|
|
void
|
|
_M_initialize();
|
|
|
|
double _M_mean;
|
|
|
|
double _M_lm_thr;
|
|
#if _GLIBCXX_USE_C99_MATH_TR1
|
|
double _M_lfm, _M_sm, _M_d, _M_scx, _M_1cx, _M_c2b, _M_cb;
|
|
#endif
|
|
};
|
|
|
|
// constructors and member function
|
|
explicit
|
|
poisson_distribution(double __mean = 1.0)
|
|
: _M_param(__mean), _M_nd()
|
|
{ }
|
|
|
|
explicit
|
|
poisson_distribution(const param_type& __p)
|
|
: _M_param(__p), _M_nd()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ _M_nd.reset(); }
|
|
|
|
/**
|
|
* @brief Returns the distribution parameter @p mean.
|
|
*/
|
|
double
|
|
mean() const
|
|
{ return _M_param.mean(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return 0; }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Return true if two Poisson distributions have the same
|
|
* parameters and the sequences that would be generated
|
|
* are equal.
|
|
*/
|
|
template<typename _IntType1>
|
|
friend bool
|
|
operator==(const std::poisson_distribution<_IntType1>& __d1,
|
|
const std::poisson_distribution<_IntType1>& __d2)
|
|
#ifdef _GLIBCXX_USE_C99_MATH_TR1
|
|
{ return __d1.param() == __d2.param() && __d1._M_nd == __d2._M_nd; }
|
|
#else
|
|
{ return __d1.param() == __d2.param(); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Inserts a %poisson_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %poisson_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _IntType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::poisson_distribution<_IntType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %poisson_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %poisson_distribution random number generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error
|
|
* state.
|
|
*/
|
|
template<typename _IntType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::poisson_distribution<_IntType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
|
|
// NB: Unused when _GLIBCXX_USE_C99_MATH_TR1 is undefined.
|
|
std::normal_distribution<double> _M_nd;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two Poisson distributions are different.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator!=(const std::poisson_distribution<_IntType>& __d1,
|
|
const std::poisson_distribution<_IntType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief An exponential continuous distribution for random numbers.
|
|
*
|
|
* The formula for the exponential probability density function is
|
|
* @f$p(x|\lambda) = \lambda e^{-\lambda x}@f$.
|
|
*
|
|
* <table border=1 cellpadding=10 cellspacing=0>
|
|
* <caption align=top>Distribution Statistics</caption>
|
|
* <tr><td>Mean</td><td>@f$\frac{1}{\lambda}@f$</td></tr>
|
|
* <tr><td>Median</td><td>@f$\frac{\ln 2}{\lambda}@f$</td></tr>
|
|
* <tr><td>Mode</td><td>@f$zero@f$</td></tr>
|
|
* <tr><td>Range</td><td>@f$[0, \infty]@f$</td></tr>
|
|
* <tr><td>Standard Deviation</td><td>@f$\frac{1}{\lambda}@f$</td></tr>
|
|
* </table>
|
|
*/
|
|
template<typename _RealType = double>
|
|
class exponential_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef exponential_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __lambda = _RealType(1))
|
|
: _M_lambda(__lambda)
|
|
{
|
|
_GLIBCXX_DEBUG_ASSERT(_M_lambda > _RealType(0));
|
|
}
|
|
|
|
_RealType
|
|
lambda() const
|
|
{ return _M_lambda; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_lambda == __p2._M_lambda; }
|
|
|
|
private:
|
|
_RealType _M_lambda;
|
|
};
|
|
|
|
public:
|
|
/**
|
|
* @brief Constructs an exponential distribution with inverse scale
|
|
* parameter @f$\lambda@f$.
|
|
*/
|
|
explicit
|
|
exponential_distribution(const result_type& __lambda = result_type(1))
|
|
: _M_param(__lambda)
|
|
{ }
|
|
|
|
explicit
|
|
exponential_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*
|
|
* Has no effect on exponential distributions.
|
|
*/
|
|
void
|
|
reset() { }
|
|
|
|
/**
|
|
* @brief Returns the inverse scale parameter of the distribution.
|
|
*/
|
|
_RealType
|
|
lambda() const
|
|
{ return _M_param.lambda(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p)
|
|
{
|
|
__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
|
|
__aurng(__urng);
|
|
return -std::log(__aurng()) / __p.lambda();
|
|
}
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two exponential distributions have the same
|
|
* parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator==(const std::exponential_distribution<_RealType>& __d1,
|
|
const std::exponential_distribution<_RealType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two exponential distributions have different
|
|
* parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::exponential_distribution<_RealType>& __d1,
|
|
const std::exponential_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %exponential_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %exponential_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::exponential_distribution<_RealType>&);
|
|
|
|
/**
|
|
* @brief Extracts a %exponential_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %exponential_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::exponential_distribution<_RealType>&);
|
|
|
|
|
|
/**
|
|
* @brief A weibull_distribution random number distribution.
|
|
*
|
|
* The formula for the normal probability density function is:
|
|
* @f[
|
|
* p(x|\alpha,\beta) = \frac{\alpha}{\beta} (\frac{x}{\beta})^{\alpha-1}
|
|
* \exp{(-(\frac{x}{\beta})^\alpha)}
|
|
* @f]
|
|
*/
|
|
template<typename _RealType = double>
|
|
class weibull_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef weibull_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __a = _RealType(1),
|
|
_RealType __b = _RealType(1))
|
|
: _M_a(__a), _M_b(__b)
|
|
{ }
|
|
|
|
_RealType
|
|
a() const
|
|
{ return _M_a; }
|
|
|
|
_RealType
|
|
b() const
|
|
{ return _M_b; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_a == __p2._M_a && __p1._M_b == __p2._M_b; }
|
|
|
|
private:
|
|
_RealType _M_a;
|
|
_RealType _M_b;
|
|
};
|
|
|
|
explicit
|
|
weibull_distribution(_RealType __a = _RealType(1),
|
|
_RealType __b = _RealType(1))
|
|
: _M_param(__a, __b)
|
|
{ }
|
|
|
|
explicit
|
|
weibull_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Return the @f$a@f$ parameter of the distribution.
|
|
*/
|
|
_RealType
|
|
a() const
|
|
{ return _M_param.a(); }
|
|
|
|
/**
|
|
* @brief Return the @f$b@f$ parameter of the distribution.
|
|
*/
|
|
_RealType
|
|
b() const
|
|
{ return _M_param.b(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two Weibull distributions have the same
|
|
* parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator==(const std::weibull_distribution<_RealType>& __d1,
|
|
const std::weibull_distribution<_RealType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two Weibull distributions have different
|
|
* parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::weibull_distribution<_RealType>& __d1,
|
|
const std::weibull_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %weibull_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %weibull_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::weibull_distribution<_RealType>&);
|
|
|
|
/**
|
|
* @brief Extracts a %weibull_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %weibull_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::weibull_distribution<_RealType>&);
|
|
|
|
|
|
/**
|
|
* @brief A extreme_value_distribution random number distribution.
|
|
*
|
|
* The formula for the normal probability mass function is
|
|
* @f[
|
|
* p(x|a,b) = \frac{1}{b}
|
|
* \exp( \frac{a-x}{b} - \exp(\frac{a-x}{b}))
|
|
* @f]
|
|
*/
|
|
template<typename _RealType = double>
|
|
class extreme_value_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef extreme_value_distribution<_RealType> distribution_type;
|
|
|
|
explicit
|
|
param_type(_RealType __a = _RealType(0),
|
|
_RealType __b = _RealType(1))
|
|
: _M_a(__a), _M_b(__b)
|
|
{ }
|
|
|
|
_RealType
|
|
a() const
|
|
{ return _M_a; }
|
|
|
|
_RealType
|
|
b() const
|
|
{ return _M_b; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_a == __p2._M_a && __p1._M_b == __p2._M_b; }
|
|
|
|
private:
|
|
_RealType _M_a;
|
|
_RealType _M_b;
|
|
};
|
|
|
|
explicit
|
|
extreme_value_distribution(_RealType __a = _RealType(0),
|
|
_RealType __b = _RealType(1))
|
|
: _M_param(__a, __b)
|
|
{ }
|
|
|
|
explicit
|
|
extreme_value_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Return the @f$a@f$ parameter of the distribution.
|
|
*/
|
|
_RealType
|
|
a() const
|
|
{ return _M_param.a(); }
|
|
|
|
/**
|
|
* @brief Return the @f$b@f$ parameter of the distribution.
|
|
*/
|
|
_RealType
|
|
b() const
|
|
{ return _M_param.b(); }
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return std::numeric_limits<result_type>::min(); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{ return std::numeric_limits<result_type>::max(); }
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two extreme value distributions have the same
|
|
* parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator==(const std::extreme_value_distribution<_RealType>& __d1,
|
|
const std::extreme_value_distribution<_RealType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two extreme value distributions have different
|
|
* parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::extreme_value_distribution<_RealType>& __d1,
|
|
const std::extreme_value_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
/**
|
|
* @brief Inserts a %extreme_value_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %extreme_value_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::extreme_value_distribution<_RealType>&);
|
|
|
|
/**
|
|
* @brief Extracts a %extreme_value_distribution random number
|
|
* distribution @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %extreme_value_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error state.
|
|
*/
|
|
template<typename _RealType, typename _CharT, typename _Traits>
|
|
std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::extreme_value_distribution<_RealType>&);
|
|
|
|
|
|
/**
|
|
* @brief A discrete_distribution random number distribution.
|
|
*
|
|
* The formula for the discrete probability mass function is
|
|
*
|
|
*/
|
|
template<typename _IntType = int>
|
|
class discrete_distribution
|
|
{
|
|
static_assert(std::is_integral<_IntType>::value,
|
|
"template argument not an integral type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _IntType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef discrete_distribution<_IntType> distribution_type;
|
|
friend class discrete_distribution<_IntType>;
|
|
|
|
param_type()
|
|
: _M_prob(), _M_cp()
|
|
{ }
|
|
|
|
template<typename _InputIterator>
|
|
param_type(_InputIterator __wbegin,
|
|
_InputIterator __wend)
|
|
: _M_prob(__wbegin, __wend), _M_cp()
|
|
{ _M_initialize(); }
|
|
|
|
param_type(initializer_list<double> __wil)
|
|
: _M_prob(__wil.begin(), __wil.end()), _M_cp()
|
|
{ _M_initialize(); }
|
|
|
|
template<typename _Func>
|
|
param_type(size_t __nw, double __xmin, double __xmax,
|
|
_Func __fw);
|
|
|
|
// See: http://cpp-next.com/archive/2010/10/implicit-move-must-go/
|
|
param_type(const param_type&) = default;
|
|
param_type& operator=(const param_type&) = default;
|
|
|
|
std::vector<double>
|
|
probabilities() const
|
|
{ return _M_prob.empty() ? std::vector<double>(1, 1.0) : _M_prob; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_prob == __p2._M_prob; }
|
|
|
|
private:
|
|
void
|
|
_M_initialize();
|
|
|
|
std::vector<double> _M_prob;
|
|
std::vector<double> _M_cp;
|
|
};
|
|
|
|
discrete_distribution()
|
|
: _M_param()
|
|
{ }
|
|
|
|
template<typename _InputIterator>
|
|
discrete_distribution(_InputIterator __wbegin,
|
|
_InputIterator __wend)
|
|
: _M_param(__wbegin, __wend)
|
|
{ }
|
|
|
|
discrete_distribution(initializer_list<double> __wl)
|
|
: _M_param(__wl)
|
|
{ }
|
|
|
|
template<typename _Func>
|
|
discrete_distribution(size_t __nw, double __xmin, double __xmax,
|
|
_Func __fw)
|
|
: _M_param(__nw, __xmin, __xmax, __fw)
|
|
{ }
|
|
|
|
explicit
|
|
discrete_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Returns the probabilities of the distribution.
|
|
*/
|
|
std::vector<double>
|
|
probabilities() const
|
|
{
|
|
return _M_param._M_prob.empty()
|
|
? std::vector<double>(1, 1.0) : _M_param._M_prob;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{ return result_type(0); }
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{
|
|
return _M_param._M_prob.empty()
|
|
? result_type(0) : result_type(_M_param._M_prob.size() - 1);
|
|
}
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Inserts a %discrete_distribution random number distribution
|
|
* @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %discrete_distribution random number distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _IntType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::discrete_distribution<_IntType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %discrete_distribution random number distribution
|
|
* @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %discrete_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error
|
|
* state.
|
|
*/
|
|
template<typename _IntType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::discrete_distribution<_IntType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two discrete distributions have the same
|
|
* parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator==(const std::discrete_distribution<_IntType>& __d1,
|
|
const std::discrete_distribution<_IntType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two discrete distributions have different
|
|
* parameters.
|
|
*/
|
|
template<typename _IntType>
|
|
inline bool
|
|
operator!=(const std::discrete_distribution<_IntType>& __d1,
|
|
const std::discrete_distribution<_IntType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief A piecewise_constant_distribution random number distribution.
|
|
*
|
|
* The formula for the piecewise constant probability mass function is
|
|
*
|
|
*/
|
|
template<typename _RealType = double>
|
|
class piecewise_constant_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef piecewise_constant_distribution<_RealType> distribution_type;
|
|
friend class piecewise_constant_distribution<_RealType>;
|
|
|
|
param_type()
|
|
: _M_int(), _M_den(), _M_cp()
|
|
{ }
|
|
|
|
template<typename _InputIteratorB, typename _InputIteratorW>
|
|
param_type(_InputIteratorB __bfirst,
|
|
_InputIteratorB __bend,
|
|
_InputIteratorW __wbegin);
|
|
|
|
template<typename _Func>
|
|
param_type(initializer_list<_RealType> __bi, _Func __fw);
|
|
|
|
template<typename _Func>
|
|
param_type(size_t __nw, _RealType __xmin, _RealType __xmax,
|
|
_Func __fw);
|
|
|
|
// See: http://cpp-next.com/archive/2010/10/implicit-move-must-go/
|
|
param_type(const param_type&) = default;
|
|
param_type& operator=(const param_type&) = default;
|
|
|
|
std::vector<_RealType>
|
|
intervals() const
|
|
{
|
|
if (_M_int.empty())
|
|
{
|
|
std::vector<_RealType> __tmp(2);
|
|
__tmp[1] = _RealType(1);
|
|
return __tmp;
|
|
}
|
|
else
|
|
return _M_int;
|
|
}
|
|
|
|
std::vector<double>
|
|
densities() const
|
|
{ return _M_den.empty() ? std::vector<double>(1, 1.0) : _M_den; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return __p1._M_int == __p2._M_int && __p1._M_den == __p2._M_den; }
|
|
|
|
private:
|
|
void
|
|
_M_initialize();
|
|
|
|
std::vector<_RealType> _M_int;
|
|
std::vector<double> _M_den;
|
|
std::vector<double> _M_cp;
|
|
};
|
|
|
|
explicit
|
|
piecewise_constant_distribution()
|
|
: _M_param()
|
|
{ }
|
|
|
|
template<typename _InputIteratorB, typename _InputIteratorW>
|
|
piecewise_constant_distribution(_InputIteratorB __bfirst,
|
|
_InputIteratorB __bend,
|
|
_InputIteratorW __wbegin)
|
|
: _M_param(__bfirst, __bend, __wbegin)
|
|
{ }
|
|
|
|
template<typename _Func>
|
|
piecewise_constant_distribution(initializer_list<_RealType> __bl,
|
|
_Func __fw)
|
|
: _M_param(__bl, __fw)
|
|
{ }
|
|
|
|
template<typename _Func>
|
|
piecewise_constant_distribution(size_t __nw,
|
|
_RealType __xmin, _RealType __xmax,
|
|
_Func __fw)
|
|
: _M_param(__nw, __xmin, __xmax, __fw)
|
|
{ }
|
|
|
|
explicit
|
|
piecewise_constant_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* @brief Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Returns a vector of the intervals.
|
|
*/
|
|
std::vector<_RealType>
|
|
intervals() const
|
|
{
|
|
if (_M_param._M_int.empty())
|
|
{
|
|
std::vector<_RealType> __tmp(2);
|
|
__tmp[1] = _RealType(1);
|
|
return __tmp;
|
|
}
|
|
else
|
|
return _M_param._M_int;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns a vector of the probability densities.
|
|
*/
|
|
std::vector<double>
|
|
densities() const
|
|
{
|
|
return _M_param._M_den.empty()
|
|
? std::vector<double>(1, 1.0) : _M_param._M_den;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{
|
|
return _M_param._M_int.empty()
|
|
? result_type(0) : _M_param._M_int.front();
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{
|
|
return _M_param._M_int.empty()
|
|
? result_type(1) : _M_param._M_int.back();
|
|
}
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Inserts a %piecewise_constan_distribution random
|
|
* number distribution @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %piecewise_constan_distribution random number
|
|
* distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::piecewise_constant_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %piecewise_constan_distribution random
|
|
* number distribution @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %piecewise_constan_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error
|
|
* state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::piecewise_constant_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two piecewise constant distributions have the
|
|
* same parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator==(const std::piecewise_constant_distribution<_RealType>& __d1,
|
|
const std::piecewise_constant_distribution<_RealType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two piecewise constant distributions have
|
|
* different parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::piecewise_constant_distribution<_RealType>& __d1,
|
|
const std::piecewise_constant_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/**
|
|
* @brief A piecewise_linear_distribution random number distribution.
|
|
*
|
|
* The formula for the piecewise linear probability mass function is
|
|
*
|
|
*/
|
|
template<typename _RealType = double>
|
|
class piecewise_linear_distribution
|
|
{
|
|
static_assert(std::is_floating_point<_RealType>::value,
|
|
"template argument not a floating point type");
|
|
|
|
public:
|
|
/** The type of the range of the distribution. */
|
|
typedef _RealType result_type;
|
|
/** Parameter type. */
|
|
struct param_type
|
|
{
|
|
typedef piecewise_linear_distribution<_RealType> distribution_type;
|
|
friend class piecewise_linear_distribution<_RealType>;
|
|
|
|
param_type()
|
|
: _M_int(), _M_den(), _M_cp(), _M_m()
|
|
{ }
|
|
|
|
template<typename _InputIteratorB, typename _InputIteratorW>
|
|
param_type(_InputIteratorB __bfirst,
|
|
_InputIteratorB __bend,
|
|
_InputIteratorW __wbegin);
|
|
|
|
template<typename _Func>
|
|
param_type(initializer_list<_RealType> __bl, _Func __fw);
|
|
|
|
template<typename _Func>
|
|
param_type(size_t __nw, _RealType __xmin, _RealType __xmax,
|
|
_Func __fw);
|
|
|
|
// See: http://cpp-next.com/archive/2010/10/implicit-move-must-go/
|
|
param_type(const param_type&) = default;
|
|
param_type& operator=(const param_type&) = default;
|
|
|
|
std::vector<_RealType>
|
|
intervals() const
|
|
{
|
|
if (_M_int.empty())
|
|
{
|
|
std::vector<_RealType> __tmp(2);
|
|
__tmp[1] = _RealType(1);
|
|
return __tmp;
|
|
}
|
|
else
|
|
return _M_int;
|
|
}
|
|
|
|
std::vector<double>
|
|
densities() const
|
|
{ return _M_den.empty() ? std::vector<double>(2, 1.0) : _M_den; }
|
|
|
|
friend bool
|
|
operator==(const param_type& __p1, const param_type& __p2)
|
|
{ return (__p1._M_int == __p2._M_int
|
|
&& __p1._M_den == __p2._M_den); }
|
|
|
|
private:
|
|
void
|
|
_M_initialize();
|
|
|
|
std::vector<_RealType> _M_int;
|
|
std::vector<double> _M_den;
|
|
std::vector<double> _M_cp;
|
|
std::vector<double> _M_m;
|
|
};
|
|
|
|
explicit
|
|
piecewise_linear_distribution()
|
|
: _M_param()
|
|
{ }
|
|
|
|
template<typename _InputIteratorB, typename _InputIteratorW>
|
|
piecewise_linear_distribution(_InputIteratorB __bfirst,
|
|
_InputIteratorB __bend,
|
|
_InputIteratorW __wbegin)
|
|
: _M_param(__bfirst, __bend, __wbegin)
|
|
{ }
|
|
|
|
template<typename _Func>
|
|
piecewise_linear_distribution(initializer_list<_RealType> __bl,
|
|
_Func __fw)
|
|
: _M_param(__bl, __fw)
|
|
{ }
|
|
|
|
template<typename _Func>
|
|
piecewise_linear_distribution(size_t __nw,
|
|
_RealType __xmin, _RealType __xmax,
|
|
_Func __fw)
|
|
: _M_param(__nw, __xmin, __xmax, __fw)
|
|
{ }
|
|
|
|
explicit
|
|
piecewise_linear_distribution(const param_type& __p)
|
|
: _M_param(__p)
|
|
{ }
|
|
|
|
/**
|
|
* Resets the distribution state.
|
|
*/
|
|
void
|
|
reset()
|
|
{ }
|
|
|
|
/**
|
|
* @brief Return the intervals of the distribution.
|
|
*/
|
|
std::vector<_RealType>
|
|
intervals() const
|
|
{
|
|
if (_M_param._M_int.empty())
|
|
{
|
|
std::vector<_RealType> __tmp(2);
|
|
__tmp[1] = _RealType(1);
|
|
return __tmp;
|
|
}
|
|
else
|
|
return _M_param._M_int;
|
|
}
|
|
|
|
/**
|
|
* @brief Return a vector of the probability densities of the
|
|
* distribution.
|
|
*/
|
|
std::vector<double>
|
|
densities() const
|
|
{
|
|
return _M_param._M_den.empty()
|
|
? std::vector<double>(2, 1.0) : _M_param._M_den;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the parameter set of the distribution.
|
|
*/
|
|
param_type
|
|
param() const
|
|
{ return _M_param; }
|
|
|
|
/**
|
|
* @brief Sets the parameter set of the distribution.
|
|
* @param __param The new parameter set of the distribution.
|
|
*/
|
|
void
|
|
param(const param_type& __param)
|
|
{ _M_param = __param; }
|
|
|
|
/**
|
|
* @brief Returns the greatest lower bound value of the distribution.
|
|
*/
|
|
result_type
|
|
min() const
|
|
{
|
|
return _M_param._M_int.empty()
|
|
? result_type(0) : _M_param._M_int.front();
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the least upper bound value of the distribution.
|
|
*/
|
|
result_type
|
|
max() const
|
|
{
|
|
return _M_param._M_int.empty()
|
|
? result_type(1) : _M_param._M_int.back();
|
|
}
|
|
|
|
/**
|
|
* @brief Generating functions.
|
|
*/
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng)
|
|
{ return this->operator()(__urng, this->param()); }
|
|
|
|
template<typename _UniformRandomNumberGenerator>
|
|
result_type
|
|
operator()(_UniformRandomNumberGenerator& __urng,
|
|
const param_type& __p);
|
|
|
|
/**
|
|
* @brief Inserts a %piecewise_linear_distribution random number
|
|
* distribution @p __x into the output stream @p __os.
|
|
*
|
|
* @param __os An output stream.
|
|
* @param __x A %piecewise_linear_distribution random number
|
|
* distribution.
|
|
*
|
|
* @returns The output stream with the state of @p __x inserted or in
|
|
* an error state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_ostream<_CharT, _Traits>&
|
|
operator<<(std::basic_ostream<_CharT, _Traits>&,
|
|
const std::piecewise_linear_distribution<_RealType1>&);
|
|
|
|
/**
|
|
* @brief Extracts a %piecewise_linear_distribution random number
|
|
* distribution @p __x from the input stream @p __is.
|
|
*
|
|
* @param __is An input stream.
|
|
* @param __x A %piecewise_linear_distribution random number
|
|
* generator engine.
|
|
*
|
|
* @returns The input stream with @p __x extracted or in an error
|
|
* state.
|
|
*/
|
|
template<typename _RealType1, typename _CharT, typename _Traits>
|
|
friend std::basic_istream<_CharT, _Traits>&
|
|
operator>>(std::basic_istream<_CharT, _Traits>&,
|
|
std::piecewise_linear_distribution<_RealType1>&);
|
|
|
|
private:
|
|
param_type _M_param;
|
|
};
|
|
|
|
/**
|
|
* @brief Return true if two piecewise linear distributions have the
|
|
* same parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator==(const std::piecewise_linear_distribution<_RealType>& __d1,
|
|
const std::piecewise_linear_distribution<_RealType>& __d2)
|
|
{ return __d1.param() == __d2.param(); }
|
|
|
|
/**
|
|
* @brief Return true if two piecewise linear distributions have
|
|
* different parameters.
|
|
*/
|
|
template<typename _RealType>
|
|
inline bool
|
|
operator!=(const std::piecewise_linear_distribution<_RealType>& __d1,
|
|
const std::piecewise_linear_distribution<_RealType>& __d2)
|
|
{ return !(__d1 == __d2); }
|
|
|
|
|
|
/* @} */ // group random_distributions_poisson
|
|
|
|
/* @} */ // group random_distributions
|
|
|
|
/**
|
|
* @addtogroup random_utilities Random Number Utilities
|
|
* @ingroup random
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief The seed_seq class generates sequences of seeds for random
|
|
* number generators.
|
|
*/
|
|
class seed_seq
|
|
{
|
|
|
|
public:
|
|
/** The type of the seed vales. */
|
|
typedef uint_least32_t result_type;
|
|
|
|
/** Default constructor. */
|
|
seed_seq()
|
|
: _M_v()
|
|
{ }
|
|
|
|
template<typename _IntType>
|
|
seed_seq(std::initializer_list<_IntType> il);
|
|
|
|
template<typename _InputIterator>
|
|
seed_seq(_InputIterator __begin, _InputIterator __end);
|
|
|
|
// generating functions
|
|
template<typename _RandomAccessIterator>
|
|
void
|
|
generate(_RandomAccessIterator __begin, _RandomAccessIterator __end);
|
|
|
|
// property functions
|
|
size_t size() const
|
|
{ return _M_v.size(); }
|
|
|
|
template<typename OutputIterator>
|
|
void
|
|
param(OutputIterator __dest) const
|
|
{ std::copy(_M_v.begin(), _M_v.end(), __dest); }
|
|
|
|
private:
|
|
///
|
|
std::vector<result_type> _M_v;
|
|
};
|
|
|
|
/* @} */ // group random_utilities
|
|
|
|
/* @} */ // group random
|
|
}
|
|
|
|
#endif
|