double ncchisqp(double x, double v, double delta);
Returns the value of Non-central Chi-square random variable distribution function with v degrees of freedom and non-centrality parameter delta at the value x.
Parameters:
| x | Critical point. |
|---|---|
| v | Degrees of freedom. |
| delta | Non-centrality parameter |
Returns:
P(X ≤ x | v, delta)
Errors:
NUMERICS_ERROR is raised if v ≤ 0 or delta < 0
Usage:
double p = ncchisqp(.5, 1.5, 2.75)
Header:
#include "noncdist.h"