# R code for chapter 36 Graphical summaries of data: Aggregation
# Book details:
# http://www.amazon.co.uk/Health-Science-Statistics-using-Commander/dp/190790431X
# 

library(foreign)
campbell_mult_reg <- 
read.spss("http://www.robin-beaumont.co.uk/virtualclassroom/book2data/campbell_mlr_p12.sav",
use.value.labels=TRUE, 
max.value.labels=Inf, 
to.data.frame=TRUE )

# example of problem when missing http: prefix:
# this produces an error:
read.delim("www.robin-beaumont.co.uk/virtualclassroom/book2data/regression1.dat")
# this works:
read.delim("http://www.robin-beaumont.co.uk/virtualclassroom/book2data/regression1.dat")