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MATLAB GUI Error "Undefined function or variable 'val'"

Asked by Rom on 21 Aug 2013

I made a GUI using GUIDE.

It contains a Pop-up menu containing 3 items (A,B,C) and a pushbutton.

This very simple Gui is designed to simply display a different text for whichever item the user chooses.

If I select the first value of my pop-up menu, I should get a return print of Hello. Sections of the code can be seen below. Why doesn't the code work?

M-FILE sections

function A_popup_Callback(hObject, eventdata, handles)

val = get(hObject,'Value');

switch val

 case 1 
 x = 'Hello'; 
 case 2 
 y = 'goodbye' 
 case 3 
 z = 'thank you' end

function pushbutton1_Callback(hObject, eventdata, handles)

sprint('%s',x)

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Rom

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