an>
<span class="co">#&gt; </span>
<span class="co">#&gt;     filter, lag</span>
<span class="co">#&gt; The following objects are masked from 'package:base':</span>
<span class="co">#&gt; </span>
<span class="co">#&gt;     intersect, setdiff, setequal, union</span>
<span class="kw"><a href="https://rdrr.io/r/base/library.html">library</a></span><span class="op">(</span><span class="va"><a href="http://purrr.tidyverse.org">purrr</a></span><span class="op">)</span>
<span class="kw"><a href="https://rdrr.io/r/