a class="anchor" aria-label="anchor" href="#nuniq"></a>
</h3>
<p><code>nuniq(x)</code> returns <code>length(unique(x))</code>, the
number of unique values in the vector.</p>
</div>
<div class="section level3">
<h3 id="countna-propna-and-notna">
<code>countNA</code>, <code>propNA</code>, and
<code>notNA</code><a class="anchor" aria-label="anchor" href="#countna-propna-and-notna"></a>
</h3>
<p>These three functions are shortcuts for dealing with missing data.
You have probably written out the nested versions 