Replacing for loops with matrix math.

7 views (last 30 days)
Douglas Brenner
Douglas Brenner on 12 Oct 2018
Edited: Matt J on 12 Oct 2018
How can I simplify this code. I.e remove the loops and replace them with matrix math.
for i=1:3
for j = i:num_pts - i
diag(i,j) = testm1(j,2) * testm2(j+i,2);
end
end

Accepted Answer

Matt J
Matt J on 12 Oct 2018
Edited: Matt J on 12 Oct 2018
I wouldn't say that replacing the loops with matrix operations is a way to "simplify" it, but here's how you could do it.
[m,n]=size(diag);
[I,J]=ndgrid(1:m,1:n);
keep= J>=I & J<=num_pts-I;
I=I(keep); J=J(keep);
diag(keep) = testm1(J,2) .* testm2(J+I,2);

More Answers (0)

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by