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How can find column wise similarity of two matrix?

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SM
SM on 5 Aug 2021
Edited: Chunru on 6 Aug 2021
I have two matrice such as
A=[3 1 1 2 1 3 3 2
1 1 2 1 3 2 3 2 ];
B=[ 2 1 3 3 1 2 3 1
1 1 1 2 2 2 3 3 ];
If we look at these two matrices column wise, it is same at index 2 and 7. How can i find the index array [2 7] ?
Thanks!

Answers (2)

Chunru
Chunru on 5 Aug 2021
A=[3 1 1 2 1 3 3 2
1 1 2 1 3 2 3 2 ];
B=[ 2 1 3 3 1 2 3 1
1 1 1 2 2 2 3 3 ];
find(all(A-B==0))
ans = 1×2
2 7
  2 Comments
Chunru
Chunru on 6 Aug 2021
A = [1 2];
B = [1 2];
find(all(A==B, 1)) % explicitly 1st dimension (column wise)
ans = 1×2
1 2
A=[3 1 1 2 1 3 3 2
1 1 2 1 3 2 3 2 ];
B=[ 2 1 3 3 1 2 3 1
1 1 1 2 2 2 3 3 ];
find(all(A==B, 1)) % work for this too
ans = 1×2
2 7

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