Noncentral F mean and variance
M = distfun_ncfstat(v1,v2,delta) [M,V] = distfun_ncfstat(v1,v2,delta)
a matrix of doubles, numerator degrees of freedom, v1>0 (can be non integer).
a matrix of doubles, denominator degrees of freedom, v2>0 (can be non integer).
a matrix of doubles, the noncentrality parameter, delta>=0
a matrix of doubles, the mean
a matrix of doubles, the variance
Computes statistics from the Noncentral F-distribution.
Any scalar input argument is expanded to a matrix of doubles of the same size as the other input arguments.
The mean of the Noncentral F distribution is
if v2>2, and M is set to %nan otherwise.
The variance of the Noncentral F distribution is
if v2>4, and V is set to %nan otherwise.
http://en.wikipedia.org/wiki/Noncentral_F-distribution