Noncentral chi-square mean and variance
[M,V] = ncx2stat(NU,DELTA)
[M,V] = ncx2stat(NU,DELTA) returns the
mean of and variance for the noncentral chi-square pdf with
of freedom and noncentrality parameter
be vectors, matrices, or multidimensional arrays that all have the
same size, which is also the size of
A scalar input for
expanded to a constant array with the same dimensions as the other
The mean of the noncentral chi-square distribution with parameters ν and δ is ν+δ, and the variance is 2(ν+2δ).
[m,v] = ncx2stat(4,2) m = 6 v = 16
 Evans, M., N. Hastings, and B. Peacock. Statistical Distributions. 2nd ed., Hoboken, NJ: John Wiley & Sons, Inc., 1993, pp. 50–52.
 Johnson, N., and S. Kotz. Distributions in Statistics: Continuous Univariate Distributions-2. Hoboken, NJ: John Wiley & Sons, Inc., 1970, pp. 130–148.