std::chi_squared_distribution<std::chipsquaredxdistribution< _RealType >(3cxx)
NAME
std::chi_squared_distribution< _RealType > - A chi_squared_distribution
random number distribution.
SYNOPSIS
Classes
struct param_type
Public Types
typedef _RealType result_type
Public Member Functions
chi_squared_distribution (_RealType __n)
chi_squared_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)
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.
result_type min () const
Returns the greatest lower bound value of the distribution.
_RealType n () const
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.
Friends
template<typename _RealType1 , typename _CharT , typename _Traits >
std::basic_ostream< _CharT, _Traits > & operator<<
(std::basic_ostream< _CharT, _Traits > &__os, const
std::chi_squared_distribution< _RealType1 > &__x)
Inserts a chi_squared_distribution random number distribution __x
into the output stream __os.
bool operator== (const chi_squared_distribution &__d1, const
chi_squared_distribution &__d2)
Return true if two Chi-squared distributions have the same
parameters and the sequences that would be generated are equal.
template<typename _RealType1 , typename _CharT , typename _Traits >
std::basic_istream< _CharT, _Traits > & operator>>
(std::basic_istream< _CharT, _Traits > &__is,
std::chi_squared_distribution< _RealType1 > &__x)
Extracts a chi_squared_distribution random number distribution __x
from the input stream __is.
Detailed Description
template<typename _RealType = double>
class std::chi_squared_distribution< _RealType >" A
chi_squared_distribution random number distribution.
The formula for the normal probability mass function is $p(x|n) =
ac{x^{(n/2) - 1}e^{-x/2}}{Gamma(n/2) 2^{n/2}}$
Member Typedef Documentation
template<typename _RealType = double> typedef _RealType
std::chi_squared_distribution< _RealType >::result_type
The type of the range of the distribution.
Member Function Documentation
template<typename _RealType = double> result_type
std::chi_squared_distribution< _RealType >::max () const [inline]
Returns the least upper bound value of the distribution.
References std::numeric_limits< _Tp >::max().
template<typename _RealType = double> result_type
std::chi_squared_distribution< _RealType >::min () const [inline]
Returns the greatest lower bound value of the distribution.
template<typename _RealType = double> template<typename
_UniformRandomNumberGenerator > result_type
std::chi_squared_distribution< _RealType >::operator()
(_UniformRandomNumberGenerator & __urng) [inline]
Generating functions.
template<typename _RealType = double> param_type
std::chi_squared_distribution< _RealType >::param () const [inline]
Returns the parameter set of the distribution.
template<typename _RealType = double> void std::chi_squared_distribution<
_RealType >::param (const param_type & __param) [inline]
Sets the parameter set of the distribution.
Parameters
__param The new parameter set of the distribution.
References std::gamma_distribution< _RealType >::param().
template<typename _RealType = double> void std::chi_squared_distribution<
_RealType >::reset () [inline]
Resets the distribution state.
References std::gamma_distribution< _RealType >::reset().
Friends And Related Function Documentation
template<typename _RealType = double> template<typename _RealType1 ,
typename _CharT , typename _Traits > std::basic_ostream<_CharT,
_Traits>& operator<< (std::basic_ostream< _CharT, _Traits > & __os,
const std::chi_squared_distribution< _RealType1 > & __x) [friend]
Inserts a chi_squared_distribution random number distribution __x into
the output stream __os.
Parameters
__os An output stream.
__x A chi_squared_distribution random number distribution.
Returns
The output stream with the state of __x inserted or in an error
state.
template<typename _RealType = double> bool operator== (const
chi_squared_distribution< _RealType > & __d1, const
chi_squared_distribution< _RealType > & __d2) [friend]
Return true if two Chi-squared distributions have the same parameters
and the sequences that would be generated are equal.
template<typename _RealType = double> template<typename _RealType1 ,
typename _CharT , typename _Traits > std::basic_istream<_CharT,
_Traits>& operator>> (std::basic_istream< _CharT, _Traits > & __is,
std::chi_squared_distribution< _RealType1 > & __x) [friend]
Extracts a chi_squared_distribution random number distribution __x from
the input stream __is.
Parameters
__is An input stream.
__x A chi_squared_distribution random number generator engine.
Returns
The input stream with __x extracted or in an error state.
Author
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