ass="downlit sourceCode r">
<code class="sourceCode R"><span><span class="co"># Analyse all R files except those in the tests / presentations directories:</span></span>
<span><span class="co"># `dupree_dir` uses grep-like arguments</span></span>
<span><span class="fu"><a href="reference/dupree_dir.html">dupree_dir</a></span><span class="op">(</span></span>
<span>  <span class="st">"."</span>,</span>
<span>  filter <span class="op">=</span> <span class="st">"tests|presentations"</span>, invert <span class="o