amples</h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="co"># only keep checklists started between 6 and 8 in the morning</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/system.file.html" class="external-link">system.file</a></span><span class="op">(</span><span class="st">"extdata/ebd-sample.txt"</span>, package <span class="op">=</span> <span class="st">"auk"</span><span class="op">)</span> <span class="op