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Dear R-users, I am using R 2.13.0 and rms 3.3-0 , but can not reproduce figure 7.8 of the handouts *Regression Modeling Strategies* ( http://biostat.mc.vanderbilt.edu/wiki/pub/Main/RmS/course2.pdf) by the following code. Could any one help me figure out how to solve this? setwd('C:/Rharrell') require(rms) load('data/counties.sav') older <- counties$age6574 + counties$age75 label(older) <- '% age >= 65, 1990' pdensity <- logb(counties$pop.density+1, 10) label(pdensity) <- 'log 10 of 1992 pop per 1990 miles^2' counties <- cbind(counties, o...