NAME

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

SYNOPSIS

       #include <random.h>

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

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

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 $bda$.

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.

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

   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.

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

       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.

   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.

Friends And Related Symbol Documentation

   template<typename _RealType  = double> bool operator== (const exponential_distribution< _RealType > & __d1,
       const exponential_distribution< _RealType > & __d2) [friend]
       Return true if two exponential distributions have the same parameters.

Author

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                                                    libstdc++   std::exponential_distribution< _RealType >(3cxx)