How to catch warnings?

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Mr M.
Mr M. on 19 Sep 2018
Answered: Geoff May on 25 Jul 2020
I want to catch Warning: Matrix is close to singular or badly scaled, during a matrix division A/B.

Accepted Answer

Adam
Adam on 19 Sep 2018
may help with this. Credit to Guillaume from this answer for the link.

More Answers (1)

Geoff May
Geoff May on 25 Jul 2020
You could use the lastwarn function to reset, then check the last warning. Granted this might not work if the warning you are interested in gets overwritten by a subsequent warning that you would rather discard.
% reset the lastwarn message and id
lastwarn('', '');
% call the function that might throw a warning
diceyFunction();
% now if a warning was raised, warnMsg and warnId will not be empty.
[warnMsg, warnId] = lastwarn();
% you can check the warning message or id, or just throw the warning as an error if desired
if(isempty(warnId))
noProblem();
else
error(warnMsg, warnId);
end

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