"op">)</span></span></span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> </span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> Attaching package: ‘dplyr’</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> The following objects are masked from ‘package:stats’:</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> </span>
<span class="r-msg co"><span class="r-pr">#&gt;</span>     filter, lag</span>
<span class="r-msg co"><span class="r-pr">#&gt;</span> The followi