variables. Default is normal distribution: "normal" (function <code><a href='https://rdrr.io/r/stats/Normal.html'>rnorm</a></code>).
Uniform distribution: "uniform" (<code><a href='https://rdrr.io/r/stats/Uniform.html'>runif</a></code>)
Warning: we recommend to use normal distribution with Vx or Vy = standard deviation of the mean.</p></td>
    </tr>
    <tr>
      <th>model</th>
      <td><p>The phylogenetic model to use (see Details). Default is <code>lambda</code>.</p></td>
    </tr>
    <tr>
      <th>t