odel specification are given below.</p></td>
    </tr>
    <tr>
      <th>data</th>
      <td><p>an optional data frame containing the variables in the model.
    If not found in <code>data</code>, the variables are taken from
    <code><a href='https://rdrr.io/r/base/environment.html'>environment(formula)</a></code>, typically the environment from which
    <code>coca</code> is called.</p></td>
    </tr>
    <tr>
      <th>method</th>
      <td><p>a character string indicating which co-correspondence
    a