# Computer code for example 3.23 # HINT: # The program assumes that all files are stored in # C:\monographregression\computercode # and corresponding subfolders. # Change directory if code is located elsewhere. # change working directory setwd("c:/monographregression/computercode") library(foreign) # read data golf <- read.dta(file="data/stata/golffull.dta") attach(golf) # Estimate AIC best model of example 3.19 mod9 <- lm(price~kilometerop1+kilometerop2+ageop1+ageop2, data=golf) # Compute Cook's distance and summary cvalues <-cooks.distance(mod9) summary(cvalues)