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.

Referenced by std::operator>>().

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.