x</code> - a numeric value of <code>0</code> (male) or
<code>1</code> (female)</li>
<li>
<code>measurement</code> - numeric value of measurement in cm for
height or kg for weight</li>
</ol>
<p><strong>Note</strong>: the dataset should be sorted by
<code>subjid</code>, <code>param</code>, and <code>agedays</code>, as
demonstrated in the Example below.</p>
</div>
<div class="section level2">
<h2 id="example">Example<a class="anchor" aria-label="anchor" href="#example"></a>
</h2>
<p>Starting with a dataset suc