std_exponential_distribution.3cxx

Langue: en

Version: 346950 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

std::exponential_distribution -

An exponential continuous distribution for random numbers.

SYNOPSIS


Classes


struct param_type

Public Types


typedef _RealType result_type

Public Member Functions


exponential_distribution (const result_type &__lambda=result_type(1))

exponential_distribution (const param_type &__p)

_RealType lambda () const

result_type max () const

result_type min () const

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

template<typename _UniformRandomNumberGenerator > result_type operator() (_UniformRandomNumberGenerator &__urng, const param_type &__p)

param_type param () const

void param (const param_type &__param)

void reset ()

Detailed Description

template<typename _RealType = double> class std::exponential_distribution< _RealType >

An exponential continuous distribution for random numbers.

The formula for the exponential probability density function is $p(x|

) =
e^{-
x}$.

Mean$ac{1}{

}$ Median$ac{
ge$[0, infty]$ Standard Deviation$ac{1}{
}$ Distribution Statistics

Definition at line 4161 of file random.h.

Member Typedef Documentation

template<typename _RealType = double> typedef _RealType std::exponential_distribution< _RealType >::result_typeThe type of the range of the distribution.

Definition at line 4168 of file random.h.

Constructor & Destructor Documentation

template<typename _RealType = double> std::exponential_distribution< _RealType >::exponential_distribution (const result_type & __lambda = result_type(1)) [inline, explicit]

Constructs an exponential distribution with inverse scale parameter $

$.

Definition at line 4199 of file random.h.

Member Function Documentation

template<typename _RealType = double> _RealType std::exponential_distribution< _RealType >::lambda () const [inline]

Returns the inverse scale parameter of the distribution.

Definition at line 4220 of file random.h.

template<typename _RealType = double> result_type std::exponential_distribution< _RealType >::max () const [inline]

Returns the least upper bound value of the distribution.

Definition at line 4249 of file random.h.

template<typename _RealType = double> result_type std::exponential_distribution< _RealType >::min () const [inline]

Returns the greatest lower bound value of the distribution.

Definition at line 4242 of file random.h.

template<typename _RealType = double> template<typename _UniformRandomNumberGenerator > result_type std::exponential_distribution< _RealType >::operator() (_UniformRandomNumberGenerator & __urng) [inline]

Generating functions.

Definition at line 4257 of file random.h.

References std::exponential_distribution< _RealType >::operator()(), and std::exponential_distribution< _RealType >::param().

Referenced by std::exponential_distribution< _RealType >::operator()().

template<typename _RealType = double> param_type std::exponential_distribution< _RealType >::param () const [inline]

Returns the parameter set of the distribution.

Definition at line 4227 of file random.h.

Referenced by std::exponential_distribution< _RealType >::operator()(), std::operator==(), and std::operator>>().

template<typename _RealType = double> void std::exponential_distribution< _RealType >::param (const param_type & __param) [inline]

Sets the parameter set of the distribution. Parameters:

__param The new parameter set of the distribution.

Definition at line 4235 of file random.h.

template<typename _RealType = double> void std::exponential_distribution< _RealType >::reset () [inline]

Resets the distribution state. Has no effect on exponential distributions.

Definition at line 4214 of file random.h.

Author

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