Analyst Stephen O'Grady comments on the popularity of statistical languages in the latest rankings:
Both R and Matlab experienced gains this quarter, and this was the third consecutive quarter of growth for R in particular. While, as the plot indicates, these languages tend to outperform on Stack Overflow relative to GitHub, they are indicative of a continued rise in popularity for statistical analysis languages more broadly.
Also note the appearance of newcomer Julia on the chart, which has already attracted an impressive following in both GitHub and (to a lesser extent), StackOverflow.
O'Grady also noted that GitHub has sadly retired their rankings of top programming languages by number of repositories, but this analysis cleverly recreates the count of GitHib repositories using Google BigQuery and the GitHub Archive. Nonetheless, it does mean the methodology behind this analysis is slightly different than that of previous RedMonk programming language rankings.