="fu"><a href="reference/percent_missing.html">percent_missing</a></span><span class="op">(</span><span class="va">test</span>, grouping_cols <span class="op">=</span> <span class="st">"Subject"</span><span class="op">)</span>
<span class="co">#&gt; # A tibble: 2 x 3</span>
<span class="co">#&gt;   Subject   res    ID</span>
<span class="co">#&gt;   &lt;fct&gt;   &lt;dbl&gt; &lt;dbl&gt;</span>
<span class="co">#&gt; 1 A          50     0</span>
<span class="co">#&gt; 2 B           0     0</span></code></pre