How to generate all permutations of numbers if I have a number twice?

I cannot use perms([1 2 2]) because I dont want 1,2,2 twice.

Answer 1

[Paolo]

How about calling unique function after perms?

 data = unique(perms([1 2 2]),'rows');

 data =

     1     2     2
     2     1     2
     2     2     1