std::tr1::poisson_distribution(3)

NAME

std::tr1::poisson_distribution

template<typename _IntType = int, typename _RealType = double> class: std::tr1::poisson_distribution< _IntType, _RealType > The formula for the poisson probability mass function is $ p(i) =
ac{mean^i}{i!} e^{-mean} $ where $ mean $ is the parameter of the
distribution.; Definition at line 1829 of file random.
Public Types: typedef _RealType input_type
typedef _IntType result_type
Public Member Functions: _RealType mean () const
template<class _UniformRandomNumberGenerator> result_type operator()
(_UniformRandomNumberGenerator &__urng); poisson_distribution (const _RealType &__mean=_RealType(1)) void reset ()
Friends: template<typename _IntType1, typename _RealType1, typename _CharT,
typename _Traits> std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const poisson_distribution< _IntType1, _RealType1 > &__x); template<typename _IntType1, typename _RealType1, typename _CharT,
typename _Traits> std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits > &__is, poisson_distribution< _IntType1, _RealType1 > &__x)

template<typename _IntType = int, typename _RealType = double> _RealType: std::tr1::poisson_distribution< _IntType, _RealType >::mean () const [inline]
Gets the distribution parameter mean.; Definition at line 1849 of file random.
template<typename _IntType, typename _RealType> template<class: _UniformRandomNumberGenerator> poisson_distribution< _IntType, _RealType >::result_type std::tr1::poisson_distribution< _IntType, _RealType >::operator() (_UniformRandomNumberGenerator & __urng) [inline]
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::numeric_limits< _Tp >::epsilon(), and
std::numeric_limits< _Tp >::max().

template<typename _IntType = int, typename _RealType = double>: template<typename _IntType1, typename _RealType1, typename _CharT, typename _Traits> 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.; 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.
template<typename _IntType = int, typename _RealType = double>: template<typename _IntType1, typename _RealType1, typename _CharT, typename _Traits> 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.; 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.

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