Poisson mean and variance
M = distfun_poissstat(lambda) [M,V] = distfun_poissstat(lambda)
a matrix of doubles, the average rate of occurrence. lambda>0.
a matrix of doubles, the mean
a matrix of doubles, the variance
Computes statistics from the Poisson distribution.
Any scalar input argument is expanded to a matrix of doubles of the same size as the other input arguments.
The Mean and Variance of the Poisson Distribution are
http://en.wikipedia.org/wiki/Poisson_distribution