Info
此问题已关闭。 请重新打开它进行编辑或回答。
How do I make this loop faster?
1 次查看(过去 30 天)
显示 更早的评论
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 个评论
dpb
2018-6-9
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
2018-6-9
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 个)
此问题已关闭。
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!