="co">#&gt; 3 A3        0     0     0</span>
<span class="co">#&gt; 4 A4        8     1    25</span></code></pre></div>
</div>
<div class="section level2">
<h2 id="dropping-nas">Dropping NAs<a class="anchor" aria-label="anchor" href="#dropping-nas"></a>
</h2>
<ul>
<li><code>drop_na_if</code></li>
</ul>
<p>Suppose you wanted to drop any column that has a percentage of <code>NA</code>s greater than or equal to a certain value? <code>drop_na_if</code> does just that.</p>
<p>We can drop any columns that have gr