double poissonp(int x, double l);
Returns the value of the Poisson random variable distribution function with mean l at the value x.
Parameters:
x | Critical point. |
---|---|
l | Mean |
Returns:
P(X ≤ x | l)
Errors:
NUM_ERRROR
is raised if l ≤ 0
Usage:
double p = poissonp(5, 0.75)
Header:
#include "discdist.h"