s="fu"><a href="https://rdrr.io/r/base/ns-load.html" class="external-link">requireNamespace</a></span><span class="op">(</span><span class="st">"dplyr"</span><span class="op">)</span><span class="op">)</span> <span class="op">{</span></span></span>
<span class="r-in"><span>  <span class="kw"><a href="https://rdrr.io/r/base/stop.html" class="external-link">stop</a></span><span class="op">(</span><span class="st">"Please install the 'dplyr' package to run this example"</span><span class="op">)</span></span></