 <tr>
      <th>subject</th>
      <td><p>(character) vector of subject name</p></td>
    </tr>
    <tr>
      <th>target_subject</th>
      <td><p>(character) vector of target subject name</p></td>
    </tr>
    <tr>
      <th>trg_type</th>
      <td><p>(character) target file type, can be curv, paint (w), mgh, or nii</p></td>
    </tr>
    <tr>
      <th>src_type</th>
      <td><p>(character) source file type, can be curv or paint (w)</p></td>
    </tr>
    <tr>
      <th>outfile</th>
      <td><p>(charac