speed up max function

6 views (last 30 days)
Chaoyang Jiang
Chaoyang Jiang on 12 Apr 2018
Commented: Chaoyang Jiang on 13 Apr 2018
How to speed up max function? The following line [a,b] = max(c(1:24,1,2,3)) takes 2685.49s for calling 541390285 times. Is there any way to speed up?
c=randi(100,[24,3,3,3]);
for i=1:1000000
[a,b] = max(c(1:24,1,2,3));
end

Accepted Answer

dpb
dpb on 12 Apr 2018
A significant fraction is undoubtedly the addressing of the 4D array; the same fragment but
d=c(1:24,1,2,3);
for i=1:1000000
[a,b] = max(d);
end
cut the time by almost 50%. Whether the real application allows that simplification is unknown, but the concept of reducing the data structure overhead is key one.
  1 Comment
Chaoyang Jiang
Chaoyang Jiang on 13 Apr 2018
Thank you very much for your reply.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

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

Start Hunting!