Deleting Repeated Rows in a matrix

I need to delete duplicate rows in a matrix. I used "unique" function it deletes the duplicate rows but "re-orders" the rows in ascending order which I don't require. I need the first instance of the duplicate be kept as it is and all subsequent instances be deleted.

Answer 1

[Stephen23]

http://www.mathworks.com/help/matlab/ref/unique.html

unique(X,'rows','stable')