Volume 3/1, June 2011

Refereed articles may be downloaded individually using the links below. [Bibliography of refereed articles]

Editorial	3
Contributed Research Articles
testthat: Get Started with Testing Hadley Wickham	5
Content-Based Social Network Analysis of Mailing Lists Angela Bohn, Ingo Feinerer, Kurt Hornik and Patrick Mair	11
Rmetrics - timeDate Package Yohan Chalabi, Martin Mächler, and Diethelm Würtz	19
The digitize Package: Extracting Numerical Data from Scatterplots Timothée Poisot	25
Differential Evolution with DEoptim David Ardia, Kris Boudt, Peter Carl, Katharine M. Mullen and Brian G. Peterson	27
rworldmap: A New R package for Mapping Global Data Andy South	35
Cryptographic Boolean Functions with R Frédéric Lafitte, Dirk Van Heule and Julien Van hamme	44
Raster Images in R Graphics Paul Murrell	48
Probabilistic Weather Forecasting in R Chris Fraley, Adrian Raftery, Tilmann Gneiting, McLean Sloughter and Veronica Berrocal	55
Analyzing an Electronic Limit Order Book David Kane, Andrew Liu, and Khanh Nguyen	64
Help Desk
Giving a useR! Talk Rob J. Hyndman	69
Tips for Presenting Your Work Dianne Cook	72
Book Reviews
Forest Analytics with R (Use R)	75
News and Notes
Conference Review: Third Meeting of Polish R Users, The Influenza Challenge	76
Conference Review: Kickoff Workshop for Project MOSAIC	78
Changes in R	79
Changes on CRAN	89
News from the Bioconductor Project	101
R Foundation News	102

Table of Contents