A program that finds the same coordinate

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!

[Tommy]

If you are perhaps looking to compare pairs of coordinates, rather than compare the values within each pair:

https://www.mathworks.com/matlabcentral/answers/162622-how-to-compare-rows-in-same-matrix

Answer 1

[Ameer Hamza]

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