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Showing content from https://cplusplus.com/reference/random/poisson_distribution/mean/ below:

public member function

<random>

std::poisson_distribution::mean 
double mean() const;

Mean

Returns the mean parameter associated with the poisson_distribution.

This parameters represents the average number of events observed in the interval.

This parameter is set on construction.



Parameters none

Return value The mean parameter associated with the distribution object.

Complexity Constant.

See also
poisson_distribution::(constructor)
Construct Poisson distribution (public member function)
poisson_distribution::param
Distribution parameters (public member function)

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