title: Matlab r2013a , I can't use this function to change support package folder
body: <p>I can't use this function to change support package folder (I use MATLAB r2013a) :</p>
  
  <pre><code>matlabshared.supportpkg.setSupportPackageRoot(installDir)
  </code></pre>
  
  <p>Matlab give me this errors:</p>
  
  <blockquote>
    <p>Undefined variable <code>matlabshared</code> or function
    "matlabshared.supportpkg.checkForUpdate".</p>
  </blockquote>