Namespaces
Variants
Views
Actions

std::poisson_distribution<IntType>::poisson_distribution

From cppreference.com
 
 
 
Pseudo-random number generation
Uniform random bit generators
Engines and engine adaptors
Non-deterministic generator
Distributions
Uniform distributions
Bernoulli distributions
Poisson distributions
Normal distributions
Sampling distributions
Seed Sequences
(C++11)
C library
 
std::poisson_distribution
Member functions
poisson_distribution::poisson_distribution
(C++11)
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