NAME

       std::poisson_distribution< _IntType > - A discrete Poisson random number distribution.

SYNOPSIS

   Classes
       struct param_type

   Public Types
       typedef _IntType result_type

   Public Member Functions
       poisson_distribution (const param_type &__p)
       poisson_distribution (double __mean=1.0)
       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)
       result_type max () const
           Returns the least upper bound value of the distribution.
       double mean () const
           Returns the distribution parameter mean.
       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
       template<typename _IntType1 , typename _CharT , typename _Traits > std::basic_ostream< _CharT, _Traits >
           & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const std::poisson_distribution< _IntType1
           > &__x)
           Inserts a poisson_distribution random number distribution __x into the output stream __os.
       bool operator== (const poisson_distribution &__d1, const poisson_distribution &__d2)
           Return true if two Poisson distributions have the same parameters and the sequences that would be
           generated are equal.
       template<typename _IntType1 , typename _CharT , typename _Traits > std::basic_istream< _CharT, _Traits >
           & operator>> (std::basic_istream< _CharT, _Traits > &__is, std::poisson_distribution< _IntType1 >
           &__x)
           Extracts a poisson_distribution random number distribution __x from the input stream __is.

Detailed Description

   template<typename _IntType = int>
       class std::poisson_distribution< _IntType >" A discrete Poisson random number distribution.

       The formula for the Poisson probability density function is $p(i|) = ac{^i}{i!} e^{-}$ where $$ is the
       parameter of the distribution.

       Definition at line 4330 of file random.h.

Author

       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++                                        Thu Mar 26 2020     std::poisson_distribution< _IntType >(3cxx)