Computing a time it takes for matlab to complete a nest of for loops?

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Andy
Andy 2013-2-19
I'm trying to calculate the time it takes for matlab to complete three nests of for loops each going from 1 to a hundred. I used cputime to calculate the time. Problem is, the time increases in each trial I make. My code goes like this:
t=cputime;
for i = 1:100
for j = 1:100
for k = 1:100
end
end
end
t
Nothing should be running in the loop. I am required to just take the time it takes for matlab to go through all of the loops.

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-2-19
编辑：Azzi Abdelmalek 2013-2-19
Use tic toc
tic
for i = 1:100
for j = 1:100
for k = 1:100
end
end
end
tim=toc
  1 个评论
Azzi Abdelmalek
Azzi Abdelmalek 2013-2-19
When you say nothing should be running in the loop, it's false, the incrementation inside a loop can't be done without Matlab running!

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