<p>Here we’ve learned that <strong>plotly</strong> creates 8 histogram traces to generate the dodged bar chart: one trace for each level of <code>clarity</code>.<a href="#fn6" class="footnote-ref" id="fnref6"><sup>6</sup></a> Why one trace per category? As illustrated in Figure <a href="overview.html#fig:intro-show-hide">2.7</a>, there are two main reasons: to populate a tooltip and legend entry for each level of <code>clarity</code> level.</p>
<div class="figure" style="text-align: center"><span id="fig: