Exponential mean and variance
[M,V] = distfun_expstat ( mu )
a matrix of doubles, the average. mu>0
a matrix of doubles, the mean
a matrix of doubles, the variance
This function computes the mean and the variance of the Exponential distribution.
The mean and variance of the Exponential distribution are
Wikipedia, Exponential distribution function, http://en.wikipedia.org/wiki/Exponential_distribution