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In case you missed them, here are some articles from January of particular interest to R users:

Princeton’s Germán Rodríguez has published a useful “Introduction to R” guide, with a focus on linear and logistic regression.

Analyst firm RedMonk periodically publishes rankings of the Top 20 programming languages, as measured by activity on StackOverflow and number of repositories on GitHub. In their most recent ranking (January 2014), R is ranked #15 amongst all programming languages. An impressive ranking for a domain-specific language; the top 3 were the general-purpose languages Java, Javascript and PHP.

If you're new to the R language but keen to get started with linear modeling or logistic regression in the language, take a look at this "Introduction to R" PDF, by Princeton's Germán Rodríguez. (There's also a browsable HTML version.)

Who will win the SuperBowl this Sunday: Seattle or Denver? As pundits around the country weigh in with their predictions, you might want to check out the analysis from the New York Times' 4th Down Bot, which compares the coaches' calls on fourth down plays with what historical statistics and a point-forecasting model indicate would have been the ideal play.

"R has had a revolutionary effect on the way statistics are communicated." So says John Chambers: one of the members of the R-core team overseeing R; and co-inventor of the S language. In this interview with Trevor Hastie (his co-author on Statistical Models in S), John Chambers recounts his involvement in the birth of the S language in 1976, and how it evolved over the years to become the inspiration for the R language<