title: Are there any R packages that can be used to build a KPI tree (example provided)?
body: <p>I want to use R to provide a visual layer for some data.</p>
  <p>The kind of visual output I'm looking for looks like this (credit to <a href="https://medium.com/googleplaydev/a-kpis-guide-for-google-play-apps-and-games-intro-to-metrics-214da979f5a2" rel="nofollow noreferrer">this article</a>):</p>
  <p><a href="https://i.stack.imgur.com/HBeQa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HBeQa.png" alt="enter image description here" /></a></p>