find array equal and put it in group?

2019 12 29
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更新时间：2019 12 29
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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.

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 采纳的回答

1 个投票

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

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