 class="st"> </span>in_cols]</span>
<span id="cb14-4"><a href="#cb14-4" aria-hidden="true"></a><span class="kw">head</span>(flights)</span>
<span id="cb14-5"><a href="#cb14-5" aria-hidden="true"></a><span class="co">#    year month day dep_delay arr_delay carrier origin dest air_time distance hour    speed max_speed</span></span>
<span id="cb14-6"><a href="#cb14-6" aria-hidden="true"></a><span class="co"># 1: 2014     1   1        14        13      AA    JFK  LAX      359     2475    9 413.6490  526.5957</s