GNU R regression estimation and presentation

 A collection of functions for interpretation and presentation
 of regression analysis. These functions are used
 to produce the statistics lectures in
 <http://pj.freefaculty.org/guides>. Includes regression
 diagnostics, regression tables, and plots of interactions and
 "moderator" variables. The emphasis is on "mean-centered" and
 "residual-centered" predictors. The vignette 'rockchalk' offers a
 fairly comprehensive overview. The vignette 'Rstyle' has advice
 about coding in R. The package title 'rockchalk' refers to the
 school motto, 'Rock Chalk Jayhawk, Go K.U.'.