Articles published in the May 2006 issue of R News
Editorial
Paul Murrell 1
S4 classes for distributions
Peter Ruckdeschel, Matthias Kohl, Thomas Stabla and Florian Camphausen 2
The regress function
David Clifford and Peter McCullagh 6
Processing data for outliers
Lukasz Komsta 10
Analysing equity portfolios in R
David Kane and Jeff Enos 13
GroupSeq: Designing clinical trials using group sequential designs
Roman Pahl, Andreas Ziegler and Inke R. König 21
Using R/Sweave in everyday clinical practice
Sven Garbade and Peter Burgard 26
changeLOS: An R-package for change in length of hospital stay based on the Aalen-Johansen estimator
M. Wangler, J. Beyersmann and M. Schumacher 31
Balloon plot
Nitin Jain and Gregory R. Warnes 35
Drawing pedigree diagrams with R and graphviz
Jing Hua Zhao 38
Non-standard fonts in PostScript and PDF graphics
Paul Murrell and Brian Ripley 41
The doBy package
Søren Højsgaard 47
Normed division algebras with R: Introducing the onion package
Robin K. S. Hankin 49
Electrical properties of resistor networks
Robin K. S. Hankin 52
Resistor networks R: Introducing the ResistorArray package
Robin K. S. Hankin 52
Changes in R
R Core Team 54
The good, the bad, and the ugly—Review of Paul Murrell’s new book: “R Graphics”
David Meyer 54
Changes on CRAN
Kurt Hornik 64
News from the Bioconductor Project
Seth Falcon 70
R Foundation News
Kurt Hornik 70
Forthcoming Events: DSC 2007
Paul Murrell, Ross Ihaka, David Scott and Thomas Yee 71