std::poisson_distribution<IntType>::poisson_distribution

 

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poisson_distribution (C++11)

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normal_distribution (C++11)

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std::poisson_distribution

Member functions

poisson_distribution::poisson_distribution (C++11)

poisson_distribution::reset (C++11)

Generation

poisson_distribution::operator() (C++11)

Characteristics

poisson_distribution::mean (C++11)

poisson_distribution::param (C++11)

poisson_distribution::min (C++11)

poisson_distribution::max (C++11)

Non-member functions

operator==operator!= (C++11)(C++11)(until C++20)

operator<<operator>> (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