ref="https://rdrr.io/r/base/factor.html" class="external-link">factor</a></span><span class="op">(</span><span class="va">x</span><span class="op">+</span><span class="va">y</span><span class="op">)</span><span class="op">)</span><span class="op">)</span> <span class="op">+</span></span>
<span>  <span class="fu"><a href="../reference/geom_ridgeline_gradient.html">geom_ridgeline_gradient</a></span><span class="op">(</span><span class="op">)</span> <span class="op">+</span></span>
<span>  <span class="fu"><a 