title: prevent unchecking radio button by clicking on it in matlab
body: <p>I created GUI using GUIDE and placed to radio buttons in one button-group panel. This conveniently takes care of unchecking one radio button whenever the other one is clicked. Now what's freaking me out is I can actually uncheck a checked radio button by clicking on it a second time, leaving BOTH radio buttons unchecked. It works with either of them. The only thing I want is the standard behavior, is that asking so much....?</p>
  
  <p>I'm using Matlab 7.0, unfortunately this is all I've got.</p>