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)

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.

template<typename _IntType , typename _RealType > template<class _UniformRandomNumberGenerator > binomial_distribution< _IntType, _RealType >::result_type std::binomial_distribution< _IntType, _RealType >::operator() (_UniformRandomNumberGenerator & __urng) [inline] 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.

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: