()`).</span>
<span class="r-wrn co"><span class="r-pr">#&gt;</span> <span class="warning">Warning: </span>Removed 1 rows containing non-finite values (`stat_boxplot()`).</span>
<span class="r-plt img"><img src="gr_plot_periods-4.png" alt="" width="960" height="593"></span>
</code></pre></div>
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