std::poisson_distribution<IntType>:: poisson_distribution

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std::poisson_distribution
Member functions
poisson_distribution::poisson_distribution
Generation
Characteristics
Non-member functions
(C++11) (C++11) (until C++20)
(C++11) (C++11)
poisson_distribution ( ) : poisson_distribution ( 1.0 ) { }
(1) (since C++11)
explicit poisson_distribution ( double mean ) ;
(2) (since C++11)
explicit poisson_distribution ( const param_type & params ) ;
(3) (since C++11)

Constructs a new distribution object.

1) Uses 1.0 as the distribution parameter.
2) Uses mean as the distribution parameter.
3) Uses params as the distribution parameter.

Parameters

mean - the μ distribution parameter (the mean of the distribution)
params - the distribution parameter set

Notes

Requires that 0 < mean .

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
P0935R0 C++11 default constructor was explicit made implicit
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