Replacing a nested for-loop

Hey everyone!

I am doing pairwise comparisons of strings in a cell array using a function that I wrote. Right now I have it in a nested for-loop that looks like this

D = {'string1','string2','stringn'}
for k = 1:numel(D)
  for j = k:numel(D)
      M(k,j) = myfunction(D{k},D{j});
  end
end

This runs fairly slow. My question is there a faster way to do these pairwise comparisons using something like arrayfun?

[Azzi Abdelmalek]

You can not just say replace a double for loop. Give more details about your problem

[Ryan]

Sorry about that I edited my question. It is more specific now.

[Azzi Abdelmalek]

what is myfunction?

Answer 1

[Walter Roberson]

No. arrayfun() uses a for loop internally, so it is no faster.

You should consider vectorizing "myfunction".

[Ryan]

Thank you for the comment