How to catch warnings?

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

採用された回答

Adam
Adam 2018 年 9 月 19 日
may help with this. Credit to Guillaume from this answer for the link.

その他の回答 (1 件)

Geoff May
Geoff May 2020 年 7 月 25 日
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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