Paul's TODO list

This page contains my plans for enhancements to R. Remember R comes with absolutely no warranty, and that applies to this site and this page in particular.

Paul Murrell paul@stat.auckland.ac.nz

• Grid Graphics: An R package of "alternative" graphical functions, the main aim of which is to provide graphical support for being able to produce Trellis-like graphics.
  • My not-set-in-concrete-but-to-give-some-idea plan is to release a 0.2 version of grid (still as a package "under development") in early September 2001. The hope is to have it ready for release as a "real" package in time for the release of R 1.4 (end of 2001?) so that Deepayan has a chance to have lattice complete enought for Doug Bates to make nlme depend on lattice.
• Lattice Graphics: Use the Grid Graphics package to replicate as much as possible of Trellis. NOTE that Bill Cleveland has pointed out (and the Trademark Electronic Search System will back him up if necessary) that neither "Trellis" nor "Trellis Graphics" are registered trademarks (for a statistical graphics application). One of Doug Bates' students, Deepayan Sarkar, has taken this on and produced heaps of the functionality already.
• Implement the "density" and "angle" arguments of polygon() as per S-Plus.
• Attack the long list of graphics bugs !
• I am compiling a list of missing features or inconsistencies in R graphics that I'd like to get to. There might be some useful things in here for small student projects.