std::poisson_distribution<IntType>::poisson_distribution
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< cpp | numeric | random | poisson distribution
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 |