an class="op">)</span></span></span>
<span class="r-wrn co"><span class="r-pr">#&gt;</span> <span class="warning">Warning: </span>Using alpha for a discrete variable is not advised.</span>
<span class="r-plt img"><img src="stat_alluvium-2.png" alt="" width="700" height="433"></span>
<span class="r-in"><span><span class="co"># prioritize aesthetic binding</span></span></span>
<span class="r-in"><span><span class="va">gg</span> <span class="op">+</span> <span class="fu"><a href="geom_flow.html">geom_flow</a><