std::chi_squared_distribution - Man Page

struct param_type

typedef _RealType result_type

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.

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.

class std::chi_squared_distribution< _RealType >"A chi_squared_distribution random number distribution.

The formula for the normal probability mass function is $p(x|n) = ac{x^{(n/2) - 1}e^{-x/2}}{Gamma(n/2) 2^{n/2}}$

Since

C++11

The type of the range of the distribution.

Returns the least upper bound value of the distribution.

References std::numeric_limits< _Tp >::max().

Returns the greatest lower bound value of the distribution.

Generating functions.

Returns the parameter set of the distribution.

Sets the parameter set of the distribution.

Parameters

References std::gamma_distribution< _RealType >::param().

Resets the distribution state.

References std::gamma_distribution< _RealType >::reset().

Inserts a chi_squared_distribution random number distribution __x into the output stream __os.

Parameters

Returns

The output stream with the state of __x inserted or in an error state.

Return true if two Chi-squared distributions have the same parameters and the sequences that would be generated are equal.

Extracts a chi_squared_distribution random number distribution __x from the input stream __is.

Parameters

Returns

The input stream with __x extracted or in an error state.