DistFunc_dPoisson

DistFunc_dPoisson(_lambda, k)

Probability function of a Poisson distribution.

Parameters
lambda: float, :math:`lambdageq 0`

The intensity of the Poisson distribution

kint

The number of success.

Returns
logpfloat

The natural logarithm of the probability to get k successes.

Notes

This method implements Loader’s algorithm, the fast and accurate method described in [loader2000], with the further improvements mentioned in [dimitriadis2016].

Examples

>>> import openturns as ot
>>> p = ot.DistFunc.dPoisson(5.0, 2)