Info

この質問は閉じられています。 編集または回答するには再度開いてください。

How do I make this loop faster?

1 回表示 (過去 30 日間)
jakobjakob
jakobjakob 2018 年 6 月 9 日
閉鎖済み: Jan 2018 年 6 月 9 日
for j= 1:240
k=index_aanname(j);
for l=1:length(alldata);
while ((strcmp(alldata(l,3), SA{j})) && ...
((TA(1,j) - alldata{l,1}) <= 10.0) && ...
(strcmp(alldata(l,4), 'Voor'))) == 1
B(l) = (tijdnum(l));
end
end
end
How do I make this loop faster? It is during way too long...
  2 件のコメント
dpb
dpb 2018 年 6 月 9 日
More than likely don't need to loop over l at all but as written B will contain results for those values of l that are anywhere in the combination of the SA/TA arrays. Is this the intended result?
Also, as written the test for TA is signed; is that also intended to be one-sided?
Without rest of data arrays nobody here can test/play around with the problem.
As for speed, was B preallocated? As is, will "grow" dynamically which is a speed bottleneck of first order.
Jan
Jan 2018 年 6 月 9 日
Please post all input data such that we can run the code. Currently the posted code is meaningless, because the while loop does not stop: The condition is not modified by the body of the loop.
It is not useful to ask for the acceleration of a not running code. Please edit the question and fix it.

回答 (0 件)

この質問は閉じられています。

Community Treasure Hunt

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

Start Hunting!

Translated by