riodic</a></span><span class="op">)</span></span>
<span><span class="co">#&gt; </span></span>
<span><span class="co">#&gt; Attaching package: 'ggperiodic'</span></span>
<span><span class="co">#&gt; The following object is masked from 'package:stats':</span></span>
<span><span class="co">#&gt; </span></span>
<span><span class="co">#&gt;     filter</span></span>
<span><span class="va">Z</span> <span class="op">&lt;-</span> <span class="fu"><a href="../reference/periodic.html">periodic</a></span><span class="o