This version of waitbar is compatible with MATLAB's version. Thus, doesn't require any modification of existing functions using the waitbar. However, the property settings include with MATLAB's version will not be recognized.
This program is a heavily modified version of timebar.m by Chad English.
Great job. Thanks.
A little improvement for compatibility: in Matlab's original waitbar, the 'message' string is optional for the first call:
h=waitbar(0);
With your function it makes an error.
Like the Mathworks waitbar but better! Very useful for loops in which each iteration takes a long time. There are solutions for loops with quick iterations so the above critique is somewhat harsh.
Ross, i don't want to argue much on this, i see your point.
I mean you have a point if the computation is heavy due to what's inside the loop, but not when is due to the high number of iterations.
Updating the graphical progress display is certainly going to take longer than an addition operation like k=k+1, but will be negligible when compared to a computationally heavy process, and can be read from across the room.
ok, cool looking, but this whole waitbar thing is not very useful.
the point is that updating graphics in Matlab is very time consuming.look at this:
h = waitbar(0,'Please wait...');
k=0;
tic
for i=1:1000,
k=k+1;
waitbar(i/1000);
end
toc
k=0;
tic
for i=1:1000,
k=k+1;
end
toc
Elapsed time is 15.628354 seconds.
Elapsed time is 0.003811 seconds.
If you have a loop that takes enough time to make reasonable the use of a timebar, then using the timebar will make the computation 4000 times slower.
Updating only test is much more efficient, so i like going for a running percentage thing.
The timebar is good looking though
Very nice, though there is one bug that shows up in the provided example: the message is overwritten with the graphics handle
A fix I used is:
line 45: h = message;
becomes
line 45: h = message; message = [];
And, in the subfunction updatewaitbar:
line 143: set(hh.message,'String',message);
becomes
line 145: if ~isempty(message),set(hh.message,'String',message);end
Otherwise, it works great and is a complete drop-in replacement for waitbar. Thanks!
Updates
12 Dec 2008
Fixed problem of comparability with existing MATLAB's waitbar.m.
26 Feb 2009
I believe I fixed the bug mentioned in the comments, please contact me if any problems are encountered.
09 Jun 2009
As suggested in the comment, I changed the pause(10e-120) to drawnow. Thanks for that tip, there is always something to learn.