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

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');

Answer 1

[Walter Roberson]

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.

[Hamid]

@Walter Roberson Thank you so much.