| Pré. | Proc. |
gdtrc
Complemented gamma distribution function.SYNOPSIS:
double a, b, x, y, gdtrc();
y = gdtrc(a, b, x);
DESCRIPTION:
Returns the integral from x to infinity of the gamma probability density function:
inf.
b -
a | | b-1 -at
y = ----- | t e dt
- | |
| (b) -
x
The incomplete gamma integral is used, according to the relation:
y = igamc(b, ax).
ACCURACY:
See the igamc() Help topic.
ERROR MESSAGES:
message condition value returned
domain x < 0 0.0