libstdc++
|
Classes | |
struct | param_type |
Public Types | |
typedef _RealType | result_type |
Public Member Functions | |
gamma_distribution (_RealType __alpha_val=_RealType(1), _RealType __beta_val=_RealType(1)) | |
gamma_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) |
_RealType | alpha () const |
_RealType | beta () const |
result_type | max () 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 () |
Friends | |
template<typename _RealType1 , typename _CharT , typename _Traits > | |
std::basic_ostream< _CharT, _Traits > & | operator<< (std::basic_ostream< _CharT, _Traits > &__os, const std::gamma_distribution< _RealType1 > &__x) |
bool | operator== (const gamma_distribution &__d1, const gamma_distribution &__d2) |
template<typename _RealType1 , typename _CharT , typename _Traits > | |
std::basic_istream< _CharT, _Traits > & | operator>> (std::basic_istream< _CharT, _Traits > &__is, std::gamma_distribution< _RealType1 > &__x) |
A gamma continuous distribution for random numbers.
The formula for the gamma probability density function is:
typedef _RealType std::gamma_distribution< _RealType >::result_type |
std::gamma_distribution< _RealType >::gamma_distribution | ( | _RealType | __alpha_val = _RealType(1) , |
_RealType | __beta_val = _RealType(1) |
||
) | [inline, explicit] |
_RealType std::gamma_distribution< _RealType >::alpha | ( | ) | const [inline] |
_RealType std::gamma_distribution< _RealType >::beta | ( | ) | const [inline] |
result_type std::gamma_distribution< _RealType >::max | ( | ) | const [inline] |
Returns the least upper bound value of the distribution.
Definition at line 2446 of file random.h.
Referenced by std::gamma_distribution< result_type >::max().
result_type std::gamma_distribution< _RealType >::min | ( | ) | const [inline] |
result_type std::gamma_distribution< _RealType >::operator() | ( | _UniformRandomNumberGenerator & | __urng | ) | [inline] |
Generating functions.
Definition at line 2454 of file random.h.
Referenced by std::gamma_distribution< result_type >::operator()().
gamma_distribution< _RealType >::result_type std::gamma_distribution< _RealType >::operator() | ( | _UniformRandomNumberGenerator & | __urng, |
const param_type & | __param | ||
) |
Marsaglia, G. and Tsang, W. W. "A Simple Method for Generating Gamma Variables" ACM Transactions on Mathematical Software, 26, 3, 363-372, 2000.
Definition at line 2337 of file bits/random.tcc.
References std::log(), and std::pow().
param_type std::gamma_distribution< _RealType >::param | ( | ) | const [inline] |
void std::gamma_distribution< _RealType >::param | ( | const param_type & | __param | ) | [inline] |
void std::gamma_distribution< _RealType >::reset | ( | ) | [inline] |
Resets the distribution state.
Definition at line 2403 of file random.h.
Referenced by std::chi_squared_distribution< _RealType >::reset(), std::fisher_f_distribution< _RealType >::reset(), std::student_t_distribution< _RealType >::reset(), and std::negative_binomial_distribution< _IntType >::reset().
std::basic_ostream<_CharT, _Traits>& operator<< | ( | std::basic_ostream< _CharT, _Traits > & | __os, |
const std::gamma_distribution< _RealType1 > & | __x | ||
) | [friend] |
Inserts a gamma_distribution random number distribution __x
into the output stream __os
.
__os | An output stream. |
__x | A gamma_distribution random number distribution. |
__x
inserted or in an error state. bool operator== | ( | const gamma_distribution< _RealType > & | __d1, |
const gamma_distribution< _RealType > & | __d2 | ||
) | [friend] |
std::basic_istream<_CharT, _Traits>& operator>> | ( | std::basic_istream< _CharT, _Traits > & | __is, |
std::gamma_distribution< _RealType1 > & | __x | ||
) | [friend] |
Extracts a gamma_distribution random number distribution __x
from the input stream __is
.
__is | An input stream. |
__x | A gamma_distribution random number generator engine. |
__x
extracted or in an error state.