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boost::random::chi_squared_distribution
// In header: <boost/random/chi_squared_distribution.hpp> template<typename RealType = double> class chi_squared_distribution { public: // types typedef RealType ; typedef RealType ; // member classes/structs/unions class param_type { public: // types typedef chi_squared_distribution ; // construct/copy/destruct (RealType = ); // public member functions RealType () ; // friend functions template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, const param_type &); template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, param_type &); bool (const param_type &, const param_type &); bool (const param_type &, const param_type &); }; // construct/copy/destruct (RealType = ); (const param_type &); // public member functions template<typename URNG> RealType (URNG &); template<typename URNG> RealType (URNG &, const param_type &) ; RealType () ; RealType () ; RealType () ; param_type () ; void (const param_type &); void (); // friend functions template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, const chi_squared_distribution &); template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, chi_squared_distribution &); bool (const chi_squared_distribution &, const chi_squared_distribution &); bool (const chi_squared_distribution &, const chi_squared_distribution &); };
The chi squared distribution is a real valued distribution with one parameter, n
. The distribution produces values > 0.
The distribution function is .
chi_squared_distribution
public
construct/copy/destruct(RealType n = );
Construct a
object. chi_squared_distribution
n
is the parameter of the distribution.
Requires: t >=0 && 0 <= p <= 1
(const param_type & param);
Construct an
object from the parameters. chi_squared_distribution
chi_squared_distribution
public member functionstemplate<typename URNG> RealType (URNG & urng);
Returns a random variate distributed according to the chi squared distribution.
template<typename URNG> RealType (URNG & urng, const param_type & param) ;
Returns a random variate distributed according to the chi squared distribution with parameters specified by param
.
RealType () ;
Returns the n
parameter of the distribution.
RealType () ;
Returns the smallest value that the distribution can produce.
RealType () ;
Returns the largest value that the distribution can produce.
param_type () ;
Returns the parameters of the distribution.
void (const param_type & param);
Sets parameters of the distribution.
void ();
Effects: Subsequent uses of the distribution do not depend on values produced by any engine prior to invoking reset.
chi_squared_distribution
friend functionstemplate<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > & os, const chi_squared_distribution & c2d);
Writes the parameters of the distribution to a std::ostream
.
template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > & is, chi_squared_distribution & c2d);
Reads the parameters of the distribution from a std::istream
.
bool (const chi_squared_distribution & lhs, const chi_squared_distribution & rhs);
Returns true if the two distributions will produce the same sequence of values, given equal generators.
bool (const chi_squared_distribution & lhs, const chi_squared_distribution & rhs);
Returns true if the two distributions could produce different sequences of values, given equal generators.