Error in function of GUI(list_box)

Hi, I try to use the GUI to change the Simulink block name. When I add the list_box in my GUI design, I want to return the selected item. The MATLAB comments said that use contents{get(hObject,'Value')} returns selected item from listbox1 . However,when I try to use the contents function and to assign the value to another variable, MATLAB show me the error. The contents function is undefined.

Thank you!

Answer 1

[Geoff Hayes]

shengchan - I think what was missing from your code was the initialization of the contents variable...and so when you try to use it with

blocks = contents(get(hObject, 'Value'));

you probably get the Undefined function or variable 'contents'. Try doing

contents = cellstr(get(hObject, 'String'));
blocks = contents(get(hObject, 'Value'));

so that contents is defined before you use it.