 is calculated separately per panel, so if we facet-wrap
by species each density curve exactly touches the next higher baseline.
(This can be disabled by setting
<code>panel_scaling = FALSE</code>.)</p>
<div class="sourceCode" id="cb12"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="fu"><a href="https://ggplot2.tidyverse.org/reference/ggplot.html" class="external-link">ggplot</a></span><span class="op">(</span><span class="va">iris</span>, <span class="fu"><a href="https://