Prostate data info

Predictors (columns 1--8)

lcavol
lweight
age
lbph
svi
lcp
gleason
pgg45

outcome (column 9)

lpsa

train/test indicator (column 10)

This last column indicates which 67 observations were used as the 
"training set" and which 30 as the test set, as described on page 48
in the book.

There was an error in these data in the first edition of this
book. Subject 32 had a value of 6.1 for lweight, which translates to a
449 gm prostate! The correct value is 44.9 gm. We are grateful to
Prof. Stephen W. Link for alerting us to this error.

The features must first be scaled to have mean zero and  variance 96 (=n)
before the analyses in Tables 3.1 and beyond.  That is, if x is the  96 by 8 matrix
of features, we compute xp <- scale(x,TRUE,TRUE)