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.
[edit] Parameters
mean
-
the μ distribution parameter (the mean of the distribution)
params
-
the distribution parameter set
[edit] Notes
Requires that 0 < mean.
[edit] 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 |