A simple r-lang script to generate a "bump chart" visualisation of the RedMonk Language Rankings over time.
The latest language rankings, as of March 2018, are at The RedMonk Programming Language Rankings: January 2018. The graph from this script is viewable at RedMonk Language Rankings Over Time.
I had seen bump charts in some of Edward Tufftes work - whey they are generally referred to as slopegraphs, but when thinking about representing this data I turned to the excellent Data Visualisation from Andy Kirk.
Some quick searching for bump charts and ggplot pointed me to this lovely graph and code on college rankings from John K. Nguyen, from which this script is derived. The heavy lifting was already done.