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

Norm Matloff argues that T-tests shouldn't be part of the Statistics curriculum and questions the "star system" for p-values in R.

A nice video introduction to the dplyr package and the %>% operator, presented by Kevin Markham.

An animation of police militarization in the US, created with R and open data published by the New York Times.

An overview of the miscellaneous R functions in the DescTools package.

Some guidance from Will Stanton on becoming a "data hacker" using R and Hadoop.

A tutorial on publishing ggplot2 graphics to the web with plotly.

A Shiny app that implements the Traveling Salesman problem and animates the simulating annealing algorithm behind the solution.

R code for comparing performance of machine learning models.

Presentations at DataWeek on applications of R at companies.

Announcing new members for the R Foundation and the R Core team.

A graduate student uses R to look at the popularity of posts on Reddit.

Google introduces the CausalImpact package for R, and uses it to evaluate performance of marketing campaigns.

A review of several recent and upcoming conferences that include R-related tracks.

More presentations and video interviews from the useR! 2014 conference, from DataScience.LA.

A detailed Rcpp example based on the Collatz Conjecture.

Use Rmarkdown to create documents combining text, mathematics, and R graphical and tabular output.

A very early example of data analysis: Nile floods in 450 BC.

The Rockefeller Institute of Government uses R to simulate the finances of public sector pension funds.

General interest stories (not related to R) in the past month included: ET for the Atari 2600, Talk Like a Pirate day photos, a parody lifestyle magazine for data scientists and the spread of the Ice Bucket Challenge.

As always, thanks for the comments and please send any suggestions to me at david@revolutionanalytics.com. Don't forget you can follow the blog using an RSS reader, via email using blogtrottr, or by following me on Twitter (I'm @revodavid). You can find roundups of previous months here.