title: passing values between uicontrols
body: <p>I am just a beginner with MATLAB GUIs and just want to know simple ways to do this.</p>
  
  <p>I have four widgets: 2 list <code>uicontrol</code>s, 1 push button <code>uicontrol</code>s, and 1 static text <code>uicontrol</code>.</p>
  
  <pre><code> function pushbutton1_Callback(hObject, eventdata, handles)
   x =get(handles.popupmenu1, 'Value')  % getting the value from the popupmenu
   % doing something with it
   y=get(handles.popupmenu2, 'Value')  %  getting the value and processing it 
   % doing something with it
  
   total=x+y
   set(handles.text1, 'String', num2str(total))  % set to total...but
   % I really want it to be a string with a total.  like 'Your total is %s', total
  </code></pre>
  
  <p>Can you please help me set the text string?</p>