</span><span class="op">)</span><span class="op">)</span> <span class="op">+</span></span>
<span>  <span class="fu"><a href="../reference/stat_density_ridges.html">stat_density_ridges</a></span><span class="op">(</span>quantile_lines <span class="op">=</span> <span class="cn">TRUE</span>, quantiles <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="fl">0.025</span>, <span class="fl">0.975</span><span clas