The latest edition of the Journal of Statistical Software is out, with plenty of interesting articles for R users. A must-read is Hadley Wickham's article on “The Split-Apply-Combine Strategy for Data Analysis“, which makes a compelling argument for the use of the plyr package to partition datasets and apply sub-group analyses. Also, anyone who hasn't yet purchased a copy of R in a Nutshell should check out Dirk Eddelbuettel's review: “an impressively comprehensive introduction to R”. Other articles focus on the R packages tourr (for exploring multivariate data), lubridate (for date manipulation), DPpackage (for Bayesian Semi- and Nonparametric Modeling), TraMineR (for visualizing state sequences), DEoptim (for global Optimization by differential evolution) and wqaim (for QTL analysis). You can find the complete list of articles in Volume 40 at the link below.