lass="op">&lt;-</span> <span class="fu">renderPlot</span><span class="op">(</span><span class="op">{</span>
    
    <span class="st">'&lt;Create "ggplot" object for alluvial plot.&gt;'</span>
    
    <span class="st">'&lt;Build alluvial plot and assign globally.&gt;'</span>
    
    <span class="st">'&lt;Extract data from built plot object used to create alluvium polygons.&gt;'</span>
    
    <span class="st">'&lt;Use polygon splines to generate coordinates of alluvium boundaries.&gt;'</span>
    
    <s