code>, <code>ngrps</code>:</dt>
<dd><p>Number of observations and vector of
    the numbers of levels in each grouping factor.  See <code><a href="ngrps.html">ngrps</a></code>.</p></dd>

  <dt><code>summary</code>:</dt>
<dd><p>Computes and returns a list of summary statistics of the
      fitted model, the amount of output can be controlled via the <code>print</code> method,
      see also <code><a href="https://rdrr.io/r/base/summary.html" class="external-link">summary</a></code>.</p></dd>

   <dt><code>pr