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std::exponential_distribution< _RealType > Class Template Reference
[Poisson Distributions]

An exponential continuous distribution for random numbers. More...

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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 $p(x|\lambda) = \lambda e^{-\lambda x}$.

Distribution Statistics
Mean$\frac{1}{\lambda}$
Median$\frac{\ln 2}{\lambda}$
Mode$zero$
Range$[0, \infty]$
Standard Deviation$\frac{1}{\lambda}$

Definition at line 4140 of file random.h.

Member Typedef Documentation

template<typename _RealType = double>
typedef _RealType std::exponential_distribution< _RealType >::result_type

The type of the range of the distribution.

Definition at line 4147 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 $\lambda$.

Definition at line 4178 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 4199 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 4228 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 4221 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 4236 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 4206 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 4214 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 4193 of file random.h.

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