## These materials are adapted from the excellent book 
## "R in Action" by R. Kabakoff
## This book is by the creator of the www.statmethods.net website
## The book contains a wealth of useful information about R,
## and is highly recommended.


## How to update your R installation

Save your "Rprofile.site" file if you are using one.

## 1.  If it does not already exist,
##     create a "holding directory" for your package information

## I used D:/Holder in the example below

##  Then

## 1. Start up your older version of R
##    Run the following two lines of code in the older version

oldip <- installed.packages()[,1]
save(oldip, file="D:/Holder/installedPackages.Rdata")

## Close the older version 
## If you are using an Rprofile.site file, copy it into the new installation
## Start up the newly installed version
## From New Version, run the following 4 lines of code
## You will need to be connected to the internet


load("D:/Holder/installedPackages.Rdata")
newip <- installed.packages()[,1]
for(i in setdiff(oldip, newip))
install.packages(i)

## All of your packages will/should install and update to the latest version
## However, if any of your packages are not archived at the R website, you will need to
## go to the website where they are available and download them separately. These
## should be mentioned in an error message.
##