std::binomial_distribution< _IntType, _RealType > Class Template Reference
[Discrete Distributions]

A discrete binomial random number distribution. More...

List of all members.

Public Types

Public Member Functions

Friends


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) = \binom{n}{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  )  [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.


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:
__os An output stream.
__x A binomial_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 _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:
__is An input stream.
__x A binomial_distribution random number generator engine.
Returns:
The input stream with __x extracted or in an error state.


The documentation for this class was generated from the following files:

Generated on Thu Jul 23 21:17:45 2009 for libstdc++ by  doxygen 1.5.8