Random numbers from the hypergeometric distribution
(inversion method)
X = rhypg(num,n,K,N)
Input num positive integer or a 2-vector [lig, col] of
positive integers
n,K,N nonnegative integers such that
n<= N, K<= N and n-k<= N-K
N is the total number of elements of the population
n is the number of elements which are randomly
extracted
K is the number of elements of the population which
have the studied property
Output X num-vector or a num-matrix of random numbers
chosen from the hypergeometric distribution with
parameters n,K,N