How to catch warnings?

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Mr M.
Mr M. 2018-9-19
回答： Geoff May 2020-7-25
I want to catch Warning: Matrix is close to singular or badly scaled, during a matrix division A/B.

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Adam
Adam 2018-9-19
https://undocumentedmatlab.com/blog/trapping-warnings-efficiently
may help with this. Credit to Guillaume from this answer for the link.

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Geoff May
Geoff May 2020-7-25
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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