Manpages - std_poisson_distribution.3

struct param_type

typedef _IntType result_type

poisson_distribution (const param_type &__p)

poisson_distribution (double __mean)

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.

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.

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 4421 of file random.h.

std::poisson_distribution*< _IntType >::*result_type The type of the range of the distribution.

Definition at line 4428 of file random.h.

_IntType >::*poisson_distribution* ()= [inline]= Definition at line 4473 of file random.h.

_IntType >::*poisson_distribution* (double __mean)= [inline]=, = [explicit]= Definition at line 4476 of file random.h.

_IntType >::*poisson_distribution* (const param_type & __p)= [inline]=, = [explicit]= Definition at line 4481 of file random.h.

, typename _UniformRandomNumberGenerator > void std::poisson_distribution*< _IntType >::__generate (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator & __urng)= [inline]= Definition at line *4544 of file random.h.

, typename _UniformRandomNumberGenerator > void std::poisson_distribution*< _IntType >::__generate (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator & __urng, const *param_type & __p)= [inline]= Definition at line 4551 of file random.h.

_UniformRandomNumberGenerator > void std::poisson_distribution*< _IntType >::__generate (*result_type * __f, result_type * __t, _UniformRandomNumberGenerator & __urng, const param_type & __p)= [inline]= Definition at line 4558 of file random.h.

*std::poisson_distribution*< _IntType >::max () const= [inline]= Returns the least upper bound value of the distribution.

Definition at line 4525 of file random.h.

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

_IntType >::mean () const= [inline]= Returns the distribution parameter mean.

Definition at line 4496 of file random.h.

*std::poisson_distribution*< _IntType >::min () const= [inline]= Returns the greatest lower bound value of the distribution.

Definition at line 4518 of file random.h.

_UniformRandomNumberGenerator > result_type *std::poisson_distribution*< _IntType >::operator() (_UniformRandomNumberGenerator & __urng)= [inline]= Generating functions.

Definition at line 4533 of file random.h.

References std::poisson_distribution< _IntType >::operator()().

Referenced by std::poisson_distribution< _IntType >::operator()().

_UniformRandomNumberGenerator > poisson_distribution*< _IntType >::*result_type std::poisson_distribution*< _IntType >::operator() (_UniformRandomNumberGenerator & __urng, const *param_type & __param) A rejection algorithm when mean >= 12 and a simple method based upon the multiplication of uniform random variates otherwise. NB: The former is available only if _GLIBCXX_USE_C99_MATH_TR1 is defined.

Reference: Devroye, L. Non-Uniform Random Variates Generation. Springer-Verlag, New York, 1986, Ch. X, Sects. 3.3 & 3.4 (+ Errata!).

Definition at line 1302 of file bits/random.tcc.

References std::numeric_limits< _Tp >::epsilon(), and std::numeric_limits< _Tp >::max().

*std::poisson_distribution*< _IntType >::param () const= [inline]= Returns the parameter set of the distribution.

Definition at line 4503 of file random.h.

_IntType >::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 4511 of file random.h.

_IntType >::reset ()= [inline]= Resets the distribution state.

Definition at line 4489 of file random.h.

typename _CharT , typename _Traits > *std::basic_ostream*< _CharT, _Traits > & operator<< (*std::basic_ostream*< _CharT, _Traits > & __os, const *std::poisson_distribution*< _IntType1 > & __x)= [friend]= Inserts a poisson_distribution random number distribution __x into the output stream __os.

Parameters

__os An output stream.
__x A poisson_distribution random number distribution.

Returns

The output stream with the state of __x inserted or in an error state.

*poisson_distribution*< _IntType > & __d1, const *poisson_distribution*< _IntType > & __d2)= [friend]= Return true if two Poisson distributions have the same parameters and the sequences that would be generated are equal.

Definition at line 4569 of file random.h.

typename _CharT , typename _Traits > *std::basic_istream*< _CharT, _Traits > & operator>> (*std::basic_istream*< _CharT, _Traits > & __is, *std::poisson_distribution*< _IntType1 > & __x)= [friend]= Extracts a poisson_distribution random number distribution __x from the input stream __is.

Parameters

__is An input stream.
__x A poisson_distribution random number generator engine.

Returns

The input stream with __x extracted or in an error state.