        summaries = setSummaries(factor = defaultFactorSummaries(add = &quot;refCat&quot;)),
               vol = &quot;_withRefCat&quot;)</code></pre>
<p>We now see that “reference category” is included among the summaries used for <code>factor</code> variables.</p>
</div>
<div id="c.4" class="section level3">
<h3>2c.4</h3>
<p><strong>Finish <code>identifyNonStartCase()</code>.</strong></p>
<p>Here is an example of how the function can be written. But please note that there are many different approache