logisticp

double logisticp(double x, double m, double b);

Returns the value of the Logistic random variable distribution function with mean m and beta b at the value x.

Parameters:
xCritical point.
mMean parameter.
bScale parameter.

Returns:
P(X ≤ x | m, b)

Errors:
NUMERICS_ERROR is raised if b ≤ 0

Usage:
double p = logisticp(.5, 1.5, 2.75)

Header:
#include "contdist.h"