How can I find unique rows in a matrix, with no element order within each row?

Question

I have an array comprising n rows and 4 colums. Each of the four entries on the row is an integer, i.e.,

X = [
       111 112 432   2
         6   9 115 111
         


        

Answer 1

you should sort the rows first, then use unique(A,'rows') as HPM suggests