How to identify an iteration that throws a warning/error?
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I have a for-loop and some iterations are throwing warnings. I would like to know which iterations are the ones throwing the warning. Here is what I have tried:
errclass = zeros(1,nODF);
lastwarn(''); % reset warning state
for i = 1:nODF
DO STUFF (including computing eigenvalues of a matrix)
% check for error
[warnmsg, msgid] = lastwarn;
if ~strcmp(msgid,'')
errclass(i) = 1;
end
lastwarn(''); % reset warning state
end
However, when I evaluate sum(errclass) I get that only 8 warnings were thrown. As you can see in the attached document, which is what I see in the command window, there are far more than 8 warnings thrown, so this is somehow missing many of the warnings. Any suggestions?
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Answers (2)
Image Analyst
on 12 Feb 2016
Try
dbstop if warning
or else just step through a line at a time until the warning gets printed in the command window.
2 Comments
Image Analyst
on 13 Feb 2016
If you want to turn off warnings, read the comments in the attached file and see how I do it for some warnings I want to suppress. The comments will tell you how to suppress the warning.
Walter Roberson
on 12 Feb 2016
"DO STUFF" might be throwing multiple warnings for the same iteration. That would make the number of emitted warnings larger than the number of iterations for which warnings were counted.
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