MATLAB: Estimate time needed for a code to finish

waitbar

Hi: I am not sure if my problem can be solved. I ran a code in matlab approximately two weeks ago. I have ran a similar one before and it took around 4 or 5 days and I was able to get the result but this current code is still processing! I wish I have included a function or something that could track the processing and let me know how much time is left. I do not like to stop the code, is there any way I could know how much is left or when the code will finish processing?

thanks

Naema

Best Answer

This is my favourite solution:

   tic
   for i = 1:1e9
      if toc > 10
         fprintf('Iteration %d/%d\n',i,1e9)
         tic
      end
      % Very hard calculation
   end

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The elapsed time is easy:

iniTime = clock;
for i = 1:1000
   ...  your calculations here
   pause(0.02);  % For demonstration only
     fprintf('elapsed time: %d sec\n', etime(clock, iniTime));
     drawnow;
  end

Estimating how long the processing will run, needs additional knowledge about the calculations. In the example all iterations of the FOR loop will use a similar amount of time. But if you use "pause(rand*1000)" there is no chance for a fair estimation. Then only showing the percentage of remaining iterations is meaningful.

If your script is not based on a loop, other messages might be helpful:

fprintf('Initialize... ');
pause(0.5);
fprintf('ready\n');
fprintf('Processing stage 1... ');
pause(0.5);
fprintf('ready\n');
... etc

Best Answer

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