 also</h2>

    <div class='dont-index'><p><code><a href='multilevelMatchX.html'>multilevelMatchX</a></code>;
  <code><a href='multilevelGPSStratification.html'>multilevelGPSStratification</a></code></p></div>
    

    <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
    <pre class="examples"><div class='input'>  <span class='no'>X</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/c'>c</a></span>(<span 