random permutation of 3 numbers when repetition of digits are allowed

I want to have random permutation of 3 numbers when repetition of digits are allowed.in 3 matrix 1*3 , How can i have them in matrix?Am i supposed to program it or not?

Regards

Answer 1

[Vinod S]

Try it this way,

      a=[1 2 3];

      b=[a(ceil(3*rand(1))) a(ceil(3*rand(1))) a(ceil(3*rand(1)))];

Now each entry in b will be a random entry in a, with repetitions allowed

Answer 2

[Matt Fig]

Give this file a try: NPERMUTEK. It solves the general problem so if you need 4 or 5 at a time it will do that too.

npermutek([3 7 8],3)

ans =

       3     3     3
       3     3     7
       3     3     8
       3     7     3
       3     7     7
       3     7     8
       3     8     3
       3     8     7
       3     8     8
       7     3     3
       7     3     7
       7     3     8
       7     7     3
       7     7     7
       7     7     8
       7     8     3
       7     8     7
       7     8     8
       8     3     3
       8     3     7
       8     3     8
       8     7     3
       8     7     7
       8     7     8
       8     8     3
       8     8     7
       8     8     8