How to eliminate the rows with replication?

Hi, I have

 a=[1 1 2],

I want to know all the possible arrangements of a, then I do the permutation which gives me:

 > perms(a)

 ans =

     2     1     1
     2     1     1
     1     2     1
     1     1     2
     1     1     2
     1     2     1

How to eliminate the rows that replicated? Thanks in advance.

Answer 1

[Ahmet Cecen]

 C = unique(A,'rows')