 /></colgroup>
    <tr>
      <th>.dataset</th>
      <td><p>data frame.</p></td>
    </tr>
    <tr>
      <th>columns</th>
      <td><p>vector that indicates the name of the columns where the NA values will be added,
in the format: c("X1", "X2") for variables X1, X2.</p></td>
    </tr>
    <tr>
      <th>.p</th>
      <td><p>value between 0 and 1, indicating the proportion of NA values that will be added.</p></td>
    </tr>
    <tr>
      <th>seed</th>
      <td><p>random number seed.</p></td>
    </tr>
  