creating callback for each string of a popupmenu in GUI

%I have a popupmenu in GUI and I created 3 strings (x,y,z) in this popupmenu. I need to create callback for each 3 strings. Each string has different codes so when user click one of them, related popupmenu's codes need to work.

Answer 1

[Image Analyst]

Try this:

function popupmenu1_Callback(hObject, eventdata, handles)
try
    % Get value of popup
    selectedIndex = get(handles.popupmenu1, 'value');
    % Take action based upon selection
    if selectedIndex  == 1
        results = Function1();
    elseif selectedIndex == 2;
        results = Function2();
    elseif selectedIndex == 3;
        results = Function3();
    end
catch ME
  errorMessage = sprintf('Error in function %s() at line %d.\n\nError Message:\n%s', ...
    ME.stack(1).name, ME.stack(1).line, ME.message);
  fprintf(1, '%s\n', errorMessage);
  uiwait(warndlg(errorMessage));
end

Answer 2

[Robert Cumming]

Create a single callback for the popupmenu then switch inside that callback based on which string is selected, i.e.

 function popupCallback ( obj, event )
   str = get ( obj, 'string' );
   val = get ( obj, 'value' );
   switch str{val}
     case 'str1'
        callbackItem1 ();
     case 'str2'
        callbackItem2 ();
     case 'str3'
        callbackItem3 ();
   end
 end

[sermet]

Robert, this is my function from created popupmenu in GUI;

function popupmenu1_Callback(hObject, eventdata, handles)
% hObject    handle to popupmenu1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu1 contents as cell array % contents{get(hObject,'Value')} returns selected item from popupmenu1 % function popupCallback ( obj, event )

%when I implement your codes into this function, it gives error;

"Undefined function or variable 'obj'"