How do I delete repetitions of rows in a matrix?

Suppose I have the following matrix (the one I'm working on has 1000x1000 cells, so I'll simplify things):

a=[1,2,3; 8,7,8; 1,2,3; 5,6,0; 2,5,7; 2,5,7];

I want to get rid of rows that repeat themselves, so that I have one row left from each repetition set. The desired matrix in this case would be:

a=[1,2,3; 8,7,8; 5,6,0; 2,5,7];

How do I do this?

Answer 1

[Ahmet Cecen]

 C = unique(A,'rows')

[Natalie]

Thanks! Does the job.

Answer 2

[Andrei Bobrov]

out = unique(A,'rows','stable');

old version of MATLAB:

[~,b] = unique(A,'rows','first');
out = A(sort(b),:);

[Natalie]

Thanks!

I tried C=unique(A, 'rows'), as suggested. What does the 'stable' add?

[Guillaume]

'stable' keeps the rows in the order they first appear. If not specified, then unique return the rows in a sorted order.