 class="ref-arguments">
    <colgroup><col class="name" /><col class="desc" /></colgroup>
    <tr>
      <th>Y</th>
      <td><p>A continuous response vector (1 x n)</p></td>
    </tr>
    <tr>
      <th>W</th>
      <td><p>A treatment vector (1 x n) with numerical values indicating
treatment groups</p></td>
    </tr>
    <tr>
      <th>X</th>
      <td><p>A covariate matrix (p x n) with no intercept</p></td>
    </tr>
    <tr>
      <th>NS</th>
      <td><p>The number of strata: (only required in the funct