Subtracting one element of an array from all elements of another array
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I have two (40*40) arrays and want to subtract every element of one array from all elements of the other one. Is there any function to avoild using loops? How can I use loops for that? Thank you in advance.
Walter Roberson on 29 Jul 2022
Edited: Walter Roberson on 29 Jul 2022
result4d = hit1 - permute(hit2, [3 4 1 2]);
This will be 40 x 40 x 40 x 40.
Depending on what you are doing, you might also want to consider something like
result2d = pdist2(hit1(:), hit2(:))
and then reshape() if desired. Note that pdist2 would not be negative.