class="st">"dep_delay"</span><span class="op">)</span><span class="op">]</span></span>
<span></span>
<span><span class="va">select_cols</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"arr_delay"</span>, <span class="st">"dep_delay"</span><span class="op">)</span></span>
<span><span class="va">flights</span><span class="op">[</span> , <span class="va">..select_cols</span><span class="op">]</