[R-pkgs] First release of package "cg" for comparison of groups

From: Bill Pikounis <billpikounis_at_gmail.com>
Date: Mon, 27 Dec 2010 08:32:01 -0500

Version 0.9.0, a first release of cg, is published on CRAN and its mirrors. The "cg" name stands for "compare groups." Its genesis and evolution are driven by common "in-practice" needs to compare samples, treatments, administrations, conditions, etc. in medicine research & development. The current version provides comparisons of unpaired samples, i.e. a linear model with one factor of at least two levels. Good data graphs, modern statistical methods, and useful displays of results are emphasized.

The cg package is developed with the overall goal of a comprehensive analysis of data when comparison of groups is a primary interest. A flow of wrapper functions are contained within it to guide the full analysis and interpretation of the data. The wrapper functions encompass functions in base R and other packages. Some features include:

Once the package is loaded, the call

> example(cg)

illustrates the package with two included data sets.

A slide deck presentation of the package can be found at http://user2010.org/slides/Pikounis+Oleynick.pdf . A manuscript on the package has just recently been submitted to the Journal of Statistical Software and is under early review.

Bug reports and questions are welcome and can be directed to at "cg at billpikounis.net"

Thanks to all of the R Development Core Team for base R and its packages, all authors and maintainers of the packages Hmisc, grid, lattice, MASS, survival, multcomp, mvtnorm, nlme and VGAM on which cg depends, and all of the R community for inspiration.

Bill Pikounis and John Oleynick

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