>"extdata/barchart-sample.txt"</span>, package <span class="op">=</span> <span class="st">"auk"</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="co"># import and process barchart data</span></span></span>
<span class="r-in"><span><span class="va">barcharts</span> <span class="op">&lt;-</span> <span class="fu">process_barcharts</span><span class="op">(</span><span class="va">f</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="h