de <code>n</code> from the
columns to operate on:</p>
<div class="sourceCode" id="cb14"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb14-1"><a href="#cb14-1" tabindex="-1"></a>df <span class="sc">%&gt;%</span> </span>
<span id="cb14-2"><a href="#cb14-2" tabindex="-1"></a>  <span class="fu">summarise</span>(<span class="at">n =</span> <span class="fu">n</span>(), <span class="fu">across</span>(<span class="fu">where</span>(is.numeric) <span class="sc">&amp;</span> <span class="sc">!</span>