Vectorize two for loops
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How to vectorize this function:
for i=1:100
for j=1:200
TheOne(i,j) = i+j;
end
end
Answers (2)
David Hill
on 19 Nov 2020
Edited: David Hill
on 19 Nov 2020
[i,j]=meshgrid(1:100,1:200);
TheOne=reshape(sum((Png1(:,i)-Png2(:,j)).^2),100,[]);
4 Comments
Master Blabla
on 19 Nov 2020
David Hill
on 19 Nov 2020
Does not get any simpler.
Master Blabla
on 19 Nov 2020
David Hill
on 19 Nov 2020
Made a mistake. Try this.
[i,j]=meshgrid(1:100,1:200);
TheOne=reshape(sum((Png1(:,i)-Png2(:,j)).^2),200,[])';
CHENG QIAN LAI
on 24 Nov 2020
[i,j]=ndgrid(1:100,1:200);
% 1 2 3 . . . 200
%---------------------------
% i= 1 1 1 . . . 1 | 1
% 2 2 2 . . . 2 | 2
% 3 3 3 . . . 3 | 3
% . . . | .
% . . . | .
% . . . | .
% 100 100 100 . . . 100 | 100
%---------------------------
% j= 1 2 3 . . . 200 | 1
% 1 2 3 . . . 200 | 2
% 1 2 3 . . . 200 | 3
% . . . | .
% . . . | .
% . . . | .
% 1 2 3 . . . 200 | 100
TheOne = i+j;
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