NAME¶

std::binomial_distribution< _IntType, _RealType > -

SYNOPSIS¶

Public Types¶

typedef _RealType input_type typedef _IntType result_type

Public Member Functions¶

binomial_distribution (_IntType __t=1, const _RealType &__p=_RealType(0.5)) template<class _UniformRandomNumberGenerator > result_type operator() (_UniformRandomNumberGenerator &__urng) _RealType p () const void reset () _IntType t () const

Friends¶

template<typename _IntType1 , typename _RealType1 , typename _CharT , typename _Traits > std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const binomial_distribution< _IntType1, _RealType1 > &__x)" template<typename _IntType1 , typename _RealType1 , typename _CharT , typename _Traits > std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits > &__is, binomial_distribution< _IntType1, _RealType1 > &__x)"

Detailed Description¶

template<typename _IntType = int, typename _RealType = double>class std::binomial_distribution< _IntType, _RealType >¶

A discrete binomial random number distribution. The formula for the binomial probability mass function is $ p(i) = } p^i (1 - p)^{t - i} $ where $ t $ and $ p $ are the parameters of the distribution. Definition at line 1951 of file tr1_impl/random.

Member Function Documentation¶

template<typename _IntType , typename _RealType > template<class _UniformRandomNumberGenerator > binomial_distribution< _IntType, _RealType >::result_type std::binomial_distribution< _IntType, _RealType >::operator() (_UniformRandomNumberGenerator &__urng)¶

A rejection algorithm when t * p >= 8 and a simple waiting time method - the second in the referenced book - otherwise. NB: The former is available only if _GLIBCXX_USE_C99_MATH_TR1 is defined. Reference: Devroye, L. 'Non-Uniform Random Variates Generation.' Springer-Verlag, New York, 1986, Ch. X, Sect. 4 (+ Errata!). Definition at line 1161 of file random.tcc. References std::abs(), std::log(), and std::max().

template<typename _IntType = int, typename _RealType = double> _RealType std::binomial_distribution< _IntType, _RealType >::p () const [inline]¶

Gets the distribution p parameter. Definition at line 1979 of file tr1_impl/random.

template<typename _IntType = int, typename _RealType = double> _IntType std::binomial_distribution< _IntType, _RealType >::t () const [inline]¶

Gets the distribution t parameter. Definition at line 1972 of file tr1_impl/random.

Friends And Related Function Documentation¶

template<typename _IntType = int, typename _RealType = double> template<typename _IntType1 , typename _RealType1 , typename _CharT , typename _Traits > std::basic_ostream<_CharT, _Traits>& operator<< ( std::basic_ostream< _CharT, _Traits > &__os, const binomial_distribution< _IntType1, _RealType1 > &__x) [friend]¶

Inserts a binomial_distribution random number distribution __x into the output stream __os. Parameters: Returns:

template<typename _IntType = int, typename _RealType = double> template<typename _IntType1 , typename _RealType1 , typename _CharT , typename _Traits > std::basic_istream<_CharT, _Traits>& operator>> ( std::basic_istream< _CharT, _Traits > &__is, binomial_distribution< _IntType1, _RealType1 > &__x) [friend]¶

Extracts a binomial_distribution random number distribution __x from the input stream __is. Parameters: Returns:

Author¶

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