MATLAB: Find array equal and put it in group

Question

Hello guys! i have a problem.

i have matrix:

A = [1 0 0 0 0

0 1 0 0 1

0 0 1 0 0

0 0 0 1 0

0 1 0 0 1]

and i want to find each total row or column equal then put it in group like:

group 1 = row1;

group 2 = row 3

group 3 = row 2, row 5;

group4 = row 4

plz help me. tks.

Answer 1

This is one of the basic functionalites of the unique function, just do something like this:

A = [1	0	0	0	0
    0	1	0	0	1
    0	0	1	0	0
    0	0	0	1	0
    0	1	0	0	1];
[C,ia,ic] = unique(A,'rows');
ic
ic =
     4
     3
     2
     1
     3

The ic vector is saying for which group each row belongs