Text progress bar in Matlab

Question

I've got a Matlab function that takes some time to run, and I'd like to show the user that progress is being made. Just disping the progress every 5% or so would clutter the screen too much, as the previous text would not be erased.

How can this problem be solved? There's other important information in the command window, so clearing it is out of the question.

score 19 · Answer 1 · answered Dec 31 '13 at 15:04

Showing the progess in the Command Window is also possible (and maybe easier). I found a very simple, fast to implement solution on http://undocumentedmatlab.com/blog/command-window-text-manipulation/.

reverseStr = '';
for idx = 1 : someLargeNumber

   % Do some computation here...

   % Display the progress
   percentDone = 100 * idx / someLargeNumber;
   msg = sprintf('Percent done: %3.1f', percentDone); %Don't forget this semicolon
   fprintf([reverseStr, msg]);
   reverseStr = repmat(sprintf('\b'), 1, length(msg));
end

If you embedd this code the command line is showing (for example): "Percent done: 27.8" without entering a newline every iteration!

Note: this doesn't work on Octave, where standard output is buffered. — Franklin Yu, Feb 03 '17 at 10:56

score 8 · Accepted Answer · answered Jun 15 '12 at 12:34

8

You can use waitbar function for that. See MATLAB Documentation on waitbar.

answered Jun 15 '12 at 12:34

nrz

10,435
4
39
71

I was looking for a text version, but that was only because I didn't know how useful `waitbar` was. Thanks! – Andreas Jun 15 '12 at 12:48

score 2 · Answer 3 · answered Jun 15 '12 at 11:59

2

check this out: http://www.mathworks.com/matlabcentral/fileexchange/3607-progressbar and http://www.mathworks.com/matlabcentral/fileexchange/26773-progress-bar

answered Jun 15 '12 at 11:59

magarwal

564
4
17

amirhm · Answer 4 · 2017-03-02T12:21:04.643

Basically what is written by @Ergodicity is correct, just for Octave if you set the standard output to be buffered (which is default btw), you had to enable it by page_output_immediately(1); see this page for more octave doc: Terminal output

a very brief modifications on the proposed code:

reverseStr = '';
fprintf('Percent done: ');
for idx = 1 : someLargeNumber
   % Do some computation here...
   % Display the progress
   percentDone = 100 * idx / someLargeNumber;
   msg = sprintf('%3.1f', percentDone); %Don't forget this semicolon
   fprintf([reverseStr, msg]);
   reverseStr = repmat(sprintf('\b'), 1, length(msg));
end

Text progress bar in Matlab

4 Answers4