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A program that finds the same coordinate

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Marco Camozzi
Marco Camozzi 2020-4-20
评论： Tommy 2020-4-20
Hi,
Could someone help me find a program or function that checks if there is a matching coordinate pair in this coordinate list?
The matrix used are like this one.
XY = [0 0;
1 0;
2 0;
3 0;
0 -1;
1 -1;
2 -1;
3 -1];
Thank you so much!

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Ameer Hamza
Ameer Hamza 2020-4-20
编辑：Ameer Hamza 2020-4-20
Something like this
XY = [0 0;
1 0;
2 0;
3 0;
0 -1;
1 -1;
2 -1;
3 -1];
mask = XY(:,1)==XY(:,2);
matching_pairs = XY(mask, :);
Result:
matching_pairs =
0 0

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