public member function
<random>
| (1) | explicit extreme_value_distribution ( result_type a = 0.0, result_type b = 1.0 );
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| (2) | explicit extreme_value_distribution ( const param_type& parm ); |
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Construct extreme value distribution
Constructs an extreme_value_distribution object, adopting the distribution parameters specified either by a and b or by object parm.
Parameters
- a
- Distribution parameter a, which defines the location (shift) of the distribution.
result_type is a member type that represents the type of the random numbers generated on each call to operator(). It is defined as an alias of the first class template parameter (RealType).
- b
- Distribution parameter b, which defines the scale of the distribution.
This shall be a positive value (b>0).
result_type is a member type that represents the type of the random numbers generated on each call to operator(). It is defined as an alias of the first class template parameter (RealType).
- parm
- An object representing the distribution's parameters, obtained by a call to member function param.
param_type is a member type.
Example
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// extreme_value_distribution example
#include <iostream>
#include <chrono>
#include <random>
int main()
{
// construct a trivial random generator engine from a time-based seed:
unsigned seed = std::chrono::system_clock::now().time_since_epoch().count();
std::default_random_engine generator (seed);
std::extreme_value_distribution<double> distribution (0.0,1.0);
std::cout << "some extreme value-distributed(0.0,1.0) results:" << std::endl;
for (int i=0; i<10; ++i)
std::cout << distribution(generator) << std::endl;
return 0;
}
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Possible output:
some extreme value-distributed(0.0,1.0) results:
0.908025
-0.258103
0.780405
-0.595635
-0.770574
2.85371
-1.06437
-0.014265
-0.873724
-0.153498
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