
    <table class="ref-arguments">
    <colgroup><col class="name" /><col class="desc" /></colgroup>
    <tr>
      <th>formula</th>
      <td><p>an object of class <code><a href='https://rdrr.io/r/stats/formula.html'>formula</a></code> with the response on
the left of an operator <code>~</code>. The right side can be a factor
variable as term or an <code>1</code> if a classification by factor
levels is not desired.</p></td>
    </tr>
    <tr>
      <th>response</th>
      <td><p>an optional numeric vector 