title: I need help on this radio button
body: <p>What is the problem on this syntax? 
  why I cannot set the values from specific radio button (Ch1-4)?</p>
  
  <pre><code>switch get(get(handles.uipanel4,'SelectedObject'),'Tag')
  
  % --- Executes on button press in setF.
  function setF_Callback(hObject, eventdata, handles)
  % hObject    handle to setF (see GCBO)
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)
  global hz;
  hz=get(handles.editF, 'String');
  
  if handles.Ch1 
      set(handles.fCh1, 'String', hz);
  
  elseif handles.Ch2
      set(handles.fCh2, 'String', hz);
  
  elseif handles.Ch3
      set(handles.fCh3, 'String', hz);
  
  elseif handles.Ch4
      set(handles.fCh4, 'String', hz);
  end
  </code></pre>