double gammp(double a, double x);
Returns the incomplete gamma function Px(a).
Parameters:
| a | scalar that specifies the parametric exponent of the integrand |
|---|---|
| x | upper limit of integration |
Returns:
Px(a)
Errors:
NUMERICS_ERROR is raised if x < 0 or a ≤ 0
Header:
#include "mathx.h"