std::exponential_distribution - Man Page

struct param_type

typedef _RealType result_type

exponential_distribution ()
Constructs an exponential distribution with inverse scale parameter 1.0.
exponential_distribution (_RealType __lambda)
Constructs an exponential distribution with inverse scale parameter $lambda$.
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.

bool operator== (const exponential_distribution &__d1, const exponential_distribution &__d2)
Return true if two exponential distributions have the same parameters.

class std::exponential_distribution< _RealType >"An exponential continuous distribution for random numbers.

The formula for the exponential probability density function is $p(x|lambda) = lambda e^{-lambda x}$.

Mean$ac{1}{lambda}$ Median$ac{ln 2}{lambda}$ Mode$zero$ Range$[0, infty]$ Standard Deviation$ac{1}{lambda}$

Since

C++11

The type of the range of the distribution.

Constructs an exponential distribution with inverse scale parameter 1.0.

Constructs an exponential distribution with inverse scale parameter $lambda$.

Returns the inverse scale parameter of the distribution.

Returns the least upper bound value of the distribution.

References std::numeric_limits< _Tp >::max().

Returns the greatest lower bound value of the distribution.

Generating functions.

References std::exponential_distribution< _RealType >::operator()().

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

Returns the parameter set of the distribution.

Sets the parameter set of the distribution.

Parameters

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

Return true if two exponential distributions have the same parameters.