template<typename T>
std::vector<T>
gen_poisson_dist(std::size_t n, const RandGenParams<T> ¶ms = { });
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Produces random non-negative integer values i, distributed according to
discrete probability function:
-u i
e u
P(i|u) = ------------
i!
It returns the vector of results
Optional parameters to set:
mean, seed
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T: Type can only be [unsigned] char, [unsigned] short, [unsigned] int, [unsigned] long int, or [unsigned] long long int
n: Number of numerics to generate
params: List of all applicable parameters, see DataFrameTypes.h
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