/code> functions is replaced by the <code>y</code> aesthetic, so that <code><a href="https://ggplot2.tidyverse.org/reference/scale_continuous.html" class="external-link">scale_y_continuous()</a></code> will correctly transform the vertical scales of the layers. An example is provided in the documentation for <code><a href="../reference/stat_alluvium.html">stat_alluvium()</a></code>. <em>The <code>y</code> aesthetic must be present in order for scales to be correctly transformed.</em> The <code>weight</code>