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:	k (int) – degrees of freedom x (float) – positive Chi square variable

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.

See igamc() for accuracy.

message	condition	value returned
chdtrc domain	x < 0 or v < 1	0