    <th>age_start</th>
      <td><p>integer, set the age the Lexis Diagram starts with.</p></td>
    </tr>
    <tr>
      <th>age_end</th>
      <td><p>integer, set the age the Lexis Diagram ends with.</p></td>
    </tr>
    <tr>
      <th>delta</th>
      <td><p>numeric, set the size of the age groups. Default is 1.</p></td>
    </tr>
    <tr>
      <th>lwd</th>
      <td><p>numeric, set the linewidth of the grid.</p></td>
    </tr>
    <tr>
      <th>force_equal</th>
      <td><p>logical, by default <code