std::exponential_distribution3
An exponential continuous distribution for random numbers.
Usage
#include <random>
Classes
struct param_type
Public Types
typedef _RealType result_type
Public Member Functions
exponential_distribution ()
Constructs an exponential distribution with inverse scale parameter 1.0. exponential_distribution (_RealType __lambda)
Constructs an exponential distribution with inverse scale parameter $$. exponential_distribution (const param_type &__p)
template<typename _ForwardIterator, typename _UniformRandomNumberGenerator> void __generate (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng)
template<typename _ForwardIterator, typename _UniformRandomNumberGenerator> void __generate (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng, const param_type &__p)
template<typename _UniformRandomNumberGenerator> void __generate (result_type *__f, result_type *__t, _UniformRandomNumberGenerator &__urng, const param_type &__p)
_RealType lambda () const
Returns the inverse scale parameter of the distribution. result_type max () const
Returns the least upper bound value of the distribution. result_type min () const
Returns the greatest lower bound value of the distribution. template<typename _UniformRandomNumberGenerator> result_type operator() (_UniformRandomNumberGenerator &__urng)
Generating functions. template<typename _UniformRandomNumberGenerator> result_type operator() (_UniformRandomNumberGenerator &__urng, const param_type &__p)
param_type param () const
Returns the parameter set of the distribution. void param (const param_type &__param)
Sets the parameter set of the distribution. void reset ()
Resets the distribution state.
Friends
bool operator== (const exponential_distribution &__d1, const exponential_distribution &__d2)
Return true if two exponential distributions have the same parameters.
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}{}$
Since
C++11
Member Typedef Documentation
template<typename _RealType = double> typedef _RealType std::exponential_distribution< _RealType >::result_type
The type of the range of the distribution.
Constructor & Destructor Documentation
template<typename _RealType = double> std::exponential_distribution< _RealType >::exponential_distribution () [inline]
Constructs an exponential distribution with inverse scale parameter 1.0.
template<typename _RealType = double> std::exponential_distribution< _RealType >::exponential_distribution (_RealType __lambda) [inline], [explicit]
Constructs an exponential distribution with inverse scale parameter $$.
Member Function Documentation
template<typename _RealType = double> _RealType std::exponential_distribution< _RealType >::lambda () const [inline]
Returns the inverse scale parameter of the distribution.
template<typename _RealType = double> result_type std::exponential_distribution< _RealType >::max () const [inline]
Returns the least upper bound value of the distribution.
template<typename _RealType = double> result_type std::exponential_distribution< _RealType >::min () const [inline]
Returns the greatest lower bound value of the distribution.
template<typename _RealType = double> template<typename _UniformRandomNumberGenerator> result_type std::exponential_distribution< _RealType >::operator() (_UniformRandomNumberGenerator & __urng) [inline]
Generating functions.
Referenced by operator()().
template<typename _RealType = double> param_type std::exponential_distribution< _RealType >::param () const [inline]
Returns the parameter set of the distribution.
Referenced by 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.
template<typename _RealType = double> void std::exponential_distribution< _RealType >::reset () [inline]
Resets the distribution state. Has no effect on exponential distributions.
Releases
2 releases since Debian 5.0 (Lenny); the text changed 1 time.