Authors: Claus Dethlefsen, Søren Højsgaard and Steffen L. Lauritzen

Title: Graphical modelling software in R - status.

Abstract: 

Graphical models in their modern form have been around for nearly a
quarter of a century.  Various computer programs for inference in
graphical models have been developed over that period. Some examples
of free software programs are BUGS (Thomas 1994), CoCo (Badsberg
2001), Digram (Klein, Keiding, and Kreiner 1995), MIM (Edwards 2000),
and Tetrad (Glymour, Scheines, Spirtes, and Kelley 1987). The gR
initiative (Lauritzen 2002) aims at making graphical models available
in R (R Development Core Team 2006). A small grant from the Danish
Science Foundation supported this initiative. We will summarize the
results of the initiative so far. Specifically we will illustrate some
of the R packages for graphical modelling currently on CRAN and
discuss their strengths and weaknesses.