An extreme_value_distribution random number distribution produces random numbers x distributed according to the probability density function280
template<class RealType = double> class extreme_value_distribution{ public: // types typedef RealType result_type; typedef unspecified param_type; // constructor and reset functions explicit extreme_value_distribution(RealType a = 0.0, RealType b = 1.0); explicit extreme_value_distribution(const param_type& parm); void reset(); // generating functions template<class URNG> result_type operator()(URNG& g); template<class URNG> result_type operator()(URNG& g, const param_type& parm); // property functions RealType a() const; RealType b() const; param_type param() const; void param(const param_type& parm); result_type min() const; result_type max() const; };
explicit extreme_value_distribution(RealType a = 0.0, RealType b = 1.0);
Requires: 0 < b .
Effects: Constructs an extreme_value_distribution object; a and b correspond to the respective parameters of the distribution.
Returns: The value of the a parameter with which the object was constructed.
Returns: The value of the b parameter with which the object was constructed.
The distribution corresponding to this probability density function is also known (with a possible change of variable) as the Gumbel Type I, the log-Weibull, or the Fisher-Tippett Type I distribution.