Subtracting one element of an array from all elements of another array

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Hamid
Hamid 2022-7-29
评论： Hamid 2022-8-1
Dear all,
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.
hit1=load ('hit1.mat');
hit2=load ('hit2.mat');

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Walter Roberson
Walter Roberson 2022-7-29
编辑：Walter Roberson 2022-7-29
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.

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