title: Streamgraphs in R?
body: <p>Are there any implementations of Streamgraphs in R?</p>
  
  <blockquote>
    <p>Streamgraphs are a variant of stacked graphs and an improvement on
    Havre et al.'s ThemeRiver in the way the baseline is chosen, layer
    ordering, and color choice.</p>
  </blockquote>
  
  <p>Example: </p>
  
  <p><img src="https://i.stack.imgur.com/qMSmz.jpg" alt="enter image description here"></p>
  
  <p>Reference: <a href="http://www.leebyron.com/else/streamgraph/" rel="noreferrer">http://www.leebyron.com/else/streamgraph/</a></p>