R codes:
The R codes are combined for each chapter of the book. They are named
chapterx.R. The files for each part of the chapter are separated by 
many pound signs on a line. To run each program, you may need to copy
the required data set into one of your drives and point the R codes to 
the location so that it can correctly read the data.

If you do not currently installed the needed package, you have to do this
before you run the program.

Data Sets:
The following are the names of data sets, followed by the variables names 
(name: variables separated by commas). Note that the variables are 
separated by spaces in the file. 
For example, data in Table 2.1 is stored in file "table21.txt"

table21.txt: id, age, sbp
table41.txt: id, y, x1, x2
table42.txt: id, y, x1, x2, x3
table51.txt: id, x, y
table52.txt: id, x, y
table54.txt: age, sbp
example54.txt: y, x1, x2, x3
table56.txt: id, x1, x2, x3, x4, y
table59.txt: car, y, x
loss.txt: y, x1, x2, x3
table510.txt: y, x
table511.txt: y, x
table512.txt: year, y.