randperm Random permutation.

   P = randperm(N) returns a vector containing a random permutation of the

   integers 1:N.  For example, randperm(6) might be [2 4 5 6 1 3].

   P = randperm(N,K) returns a row vector containing K unique integers

   selected randomly from 1:N.  For example, randperm(6,3) might be [4 2 5].

   randperm(N,K) returns a vector of K unique values.  This is sometimes

   referred to as a K-permutation of 1:N or as sampling without replacement.

   To allow repeated values in the selection, sometimes referred to as

   sampling with replacement, use RANDI(N,1,K).

   randperm calls RAND and therefore changes the state of the random number

   generator that underlies RAND, RANDI, and RANDN.  Control that shared

   generator using RNG.