Compare two matrices by 2 columns and erase the different rows

Hi, i have two matrices of coordeantes of different row size (#node x y z). I need to compare them and pick the rows that share same coordenates x and y between the two matrices, so the result would be a second matrix with the same row size as the first one. Basically I need to find the same points but in another z value. Any help with that will be appreciated :) Thanks!

Answer 1

[Walter Roberson]

[has_a_match, row_index_in_second_matrix] = ismember(XYFromFirstMatrix, XYFromSecondMatrix, 'rows');

[Jandry Cabrera]

Thank you very much!