How to catch an error

Question

John Miller 2012-6-4

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40280-how-to-catch-an-error

Hi,

if I get an error I want change the algorithm: like this:

if ERROR
ALGORITHM 2
else
ALGORITHM 1
end

Hope someone can help.

Thank YOu!

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Answer 1

Image Analyst 2012-6-4

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/40280-how-to-catch-an-error#answer_49899

在 MATLAB Online 中打开

Try it like this:

try
  % No error yet, so try to run algorithm 1
  algorithm1();  
catch ME
  % You get here if algorithm 1 bombs.
  % Create an informative error message.
  errorMessage = sprintf('An error occurred in function blah_fubar().  The error reported by MATLAB is:\n\n%s\nClick OK to run algorithm2()', ME.message);
  % Print error message to command window.
  fprintf('%s', errorMessage);
  % Alert the user via a popup message.
  uiwait(warndlg((errorMessage));
  % Now run algorithm 2, because we had the error occur.
  algorithm2();
end