Public Member Functions |
| poisson_distribution (double __mean=1.0) |
| poisson_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) |
result_type | max () const |
double | mean () const |
result_type | min () const |
template<typename _UniformRandomNumberGenerator > |
result_type | operator() (_UniformRandomNumberGenerator &__urng) |
template<typename _UniformRandomNumberGenerator > |
result_type | operator() (_UniformRandomNumberGenerator &__urng, const param_type &__p) |
param_type | param () const |
void | param (const param_type &__param) |
void | reset () |
template<typename _IntType = int>
class std::poisson_distribution< _IntType >
A discrete Poisson random number distribution.
The formula for the Poisson probability density function is
where
is the parameter of the distribution.
Definition at line 4430 of file random.h.
template<typename _IntType >
template<typename _UniformRandomNumberGenerator >
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 1436 of file bits/random.tcc.
References std::abs(), std::log(), and std::poisson_distribution< _IntType >::max().