Definition at line 1829 of file random.
_RealType std::tr1::poisson_distribution< _IntType, _RealType >::mean | ( | ) | const [inline] |
poisson_distribution< _IntType, _RealType >::result_type std::tr1::poisson_distribution< _IntType, _RealType >::operator() | ( | _UniformRandomNumberGenerator & | __urng | ) |
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 906 of file random.tcc.
References std::abs(), std::ceil(), std::numeric_limits< _Tp >::epsilon(), std::floor(), std::log(), and std::numeric_limits< _Tp >::max().
std::basic_ostream<_CharT, _Traits>& operator<< | ( | std::basic_ostream< _CharT, _Traits > & | __os, | |
const poisson_distribution< _IntType1, _RealType1 > & | __x | |||
) | [friend] |
Inserts a poisson_distribution random number distribution __x
into the output stream __os
.
__os | An output stream. | |
__x | A poisson_distribution random number distribution. |
__x
inserted or in an error state. std::basic_istream<_CharT, _Traits>& operator>> | ( | std::basic_istream< _CharT, _Traits > & | __is, | |
poisson_distribution< _IntType1, _RealType1 > & | __x | |||
) | [friend] |
Extracts a poisson_distribution random number distribution __x
from the input stream __is
.
__is | An input stream. | |
__x | A poisson_distribution random number generator engine. |
__x
extracted or in an error state.