is <code>"F"</code>;</p></li>
<li><p>an integer between <code>1</code> and <code>5</code>, if <code>sign</code> is <code>"C"</code>.</p></li>
</ul></dd>


<dt>octave</dt>
<dd><p>Optional. A single integer, which can be <code>-1</code> or <code>1</code>.
<code>octave</code> can be specified only when</p><ul><li><p><code>sign</code> is <code>"G"</code> and <code>line</code> is <code>2</code>, or</p></li>
<li><p><code>sign</code> is <code>"F"</code> and <code>line</code> is <code>4</code>.</p></li>
</ul></dd>
