std::geometric_distribution

Langue: en

Version: 163904 (fedora - 05/07/09)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

std::geometric_distribution - A discrete geometric random number distribution.

SYNOPSIS


Public Types


typedef _RealType input_type

typedef _IntType result_type

Public Member Functions


geometric_distribution (const _RealType &__p=_RealType(0.5))

template<class _UniformRandomNumberGenerator > result_type operator() (_UniformRandomNumberGenerator &__urng)

_RealType p () const

void reset ()

Friends


template<typename _IntType1 , typename _RealType1 , typename _CharT , typename _Traits > std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const geometric_distribution< _IntType1, _RealType1 > &__x)

template<typename _CharT , typename _Traits > std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits > &__is, geometric_distribution &__x)

Detailed Description

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

A discrete geometric random number distribution.

The formula for the geometric probability mass function is $ p(i) = (1 - p)p^{i-1} $ where $ p $ is the parameter of the distribution.

Definition at line 1778 of file tr1_impl/random.

Member Function Documentation

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

Gets the distribution parameter p.

Definition at line 1798 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 geometric_distribution< _IntType1, _RealType1 > & __x) [friend]

Inserts a geometric_distribution random number distribution __x into the output stream __os.

Parameters:

__os An output stream.
__x A geometric_distribution random number distribution.

Returns:

The output stream with the state of __x inserted or in an error state.

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

Extracts a geometric_distribution random number distribution __x from the input stream __is.

Parameters:

__is An input stream.
__x A geometric_distribution random number generator engine.

Returns:

The input stream with __x extracted or in an error state.

Definition at line 1835 of file tr1_impl/random.

Author

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