Breaking out from loop

Hi,

I have a for loop that run over 50 times. In the loop i'm doing cross correlation in diff images. then after then loop finish i look for the best image match.

However i find the loop take quite a long time when my image size is big. I would like to stop the loop once i get 90% match n i want my program to jump out from the loop after 2 min of execution in the loop if it is still looping after 2 min regardless there is a match or not.

i could use while loop instead of for loop but i dono how to stop the loop after 2 minutes.

Please advice.

Answer 1

[Javier]

Hi, you can use the "tic" and "toc" matlab functions, which ones let you to create a timer and control the elapsed time between the execution of a code, for example in your case:

tStart=tic;%starts the timer
for n=1:10e50
a=n+1;%here your function
tEnd=toc(tStart);
if(tEnd>=(2*60))%checks if it has passed 2minutes
  disp('It has spent 2min');
  break;%break the for loop if it's true the condition
end
end

tEnd has got the time elapsed in seconds, and 10e50 is a value I have set randomly to make the code spend more than two minutes. In the condition you can see I have set "2" minutes in seconds.

Regards!

[Kyle]

Thanks

Answer 2

[Fangjun Jiang]

It sounds like a good use case for a timer object. See this link