std::poisson_distribution::poisson_distribution

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Pseudo-random number generation
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Bernoulli distributions
Poisson distributions
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(C++11)
C library
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. (2) uses mean as the distribution parameter. (3) uses params as the distribution parameter.

Parameters

mean - the 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