# R in Action (2nd ed): Chapter 21
# Creating a package
# requires packages roxygen2
# install.packages("roxygen2", depend=TRUE)
# Windows users will need
#   rtools.exe (http://cran.r-project.org/bin/windows/Rtools/) 
#   MikTeX (http://miktex.org/)
# Mac users will need
#   MacTeX (http://www.tug.org/mactex/)
# Linux users should just need the roxygen2 package
#-------------------------------------------------------------------

# install the npar package
pkg <- "npar_1.0.tar.gz"
loc <- "http://www.statmethods.net/RiA"
url <- paste(loc, pkg, sep="/")
download.file(url, pkg)
install.packages(pkg, repos=NULL, type="source")

# try out the package
library(npar)
hist(life$hlef, xlab="Healthy Life Expectacy (years) at Age 65",
     main="Distribution of Healthy Life Expectancy for Women", 
     col="grey", breaks=10)
dotchart(hlef ~ region, life, col="darkgrey", vertical=TRUE,
   xlab="US Region",
   ylab="Healthy Life Expectancy (years) at Age 65",
   main="Distribution of HLE Estimates by Region")

results <- oneway(hlef ~ region, life)
summary(results)
plot(results, col="lightblue", main="Multiple Comparisons",  
       xlab="US Region", 
       ylab="Healthy Life Expectancy (years) at Age 65")


# source code for the package can be 
# downloaded from
http://www.statmethods.net/RiA/nparFiles.zip