how i can call back the value that come out at comand window to do if else command to dialog box

i wanted to do a dialog box for GUI, where the dialog box will explain to me the type of error...to know what type of error its depend on the value that i got from previous step..the value come out in command window...how i can call the data from comand window to relate it with dialog box?

so how i can do that...???

Answer 1

[Geoff Hayes]

Nur - you could try using lasterror or a try and catch block around your code to capture any errors that may occur. If doing the latter, you could try something like

 try
     A = randi(255,12,12);
     fprintf('%d',A(13,1));  % accessing an invalid element of A
 catch mException
    errordlg(mException.message);
 end

In the above code, we try to access an invalid element of the 12x12 matrix A. When this occurs, an exception is thrown and a dialog (see predefined dialog boxes) is shown with the text Index exceeds matrix dimensions which would be the same text that would be written to the Command Window.

I think that wrapping your code in a try and catch block is a neat way to handle errors that you can catch and display to the user.