">ggplot</a></span><span class="op">(</span><span class="va">d</span>, <span class="fu"><a href="https://ggplot2.tidyverse.org/reference/aes.html" class="external-link">aes</a></span><span class="op">(</span><span class="va">x</span>, <span class="va">y</span>, height <span class="op">=</span> <span class="va">height</span>, group <span class="op">=</span> <span class="va">y</span><span class="op">)</span><span class="op">)</span> <span class="op">+</span> </span>
<span>  <span class="fu"><a href="../refere