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Displaying error messages on a MATLAB GUI

Hi there, I just have a general question about MATLAB GUIs: is it possible to display error messages within an 'edit' text box? For example, if I have a simple GUIDE-generated GUI which runs code when a pushbutton is pressed, I know that I can use 'edit' text boxes to put in mathematical values ( the 'input boxes').
If I was to put a word instead of a number into the input boxes, I know that there will be an error displayed on the MATLAB command window-however, is there a line of code which would allow me to display this message (or another message) in the input boxes, if the pushbutton were to be pressed?
Any suggestion would be most helpful!
-Nathan.

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3 Answers

Answer by Fangjun Jiang on 4 Nov 2011
 Accepted Answer

You'll need to use try-catch to catch a possible error and then use lasterr() to get the error message. Check the documentation for these functions in your version of MATLAB as they might have been changed.
try
a=1/'abc';
catch
ErrorMessage=lasterr;
disp(ErrorMessage);
end

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Answer by Jan
on 4 Nov 2011

To be exact, you can display strings in an edit field only, and not numbers. Therefore you can easily display an error message in such a control.
If you get an error message, please post the complete message here together with the corresponding code.

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Answer by Sreeram Mohan on 7 Nov 2011

Using
try
catch E
end
and using message ID from 'E' or message would give more control on error management.
--sreeram

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