.</li>
<li><em>nsamp</em> is the number of samples of ECG_matrix.</li>
<li><em>nsig</em> is the amount of leads or signals of ECG_matrix.</li>
<li><em>gain</em> is a vector of [nsig × 1] with the gain of each lead ( ADCsamples / μV ).</li>
<li><em>adczero</em> is a vector of [nsig × 1] with the offset of each lead in ADC samples.</li>
</ul>
<p>and others described in the <a class="reference external" href="http://www.physionet.org/physiotools/wag/header-5.htm">Physionet header</a>.</p>
</div></blockquote