Survival function¶
-
chdtrc
(k, x)¶ Returns the area under the right hand tail (from x to infinity) of the Chi square probability density function with k degrees of freedom.
Parameters:
Description¶
The incomplete gamma integral is used according to the formula:
chdtr(k, x) = igamc(k/2, x/2)
The arguments must both be positive.
Accuracy¶
See igamc()
for accuracy.
Error messages¶
message | condition | value returned |
---|---|---|
chdtrc domain | x < 0 or v < 1 | 0 |
Reference: http://www.netlib.org/cephes/doubldoc.html#chdtrc