This is an old post and I wrote it when it was impossible to install R with simple (it was installing old 2.15 version):
sudo apt-get install r-base-core
Right now you do not need to do all written below and can simply use the abovementioned command. At the time of updating it will give you 3.1 version.
Here is previous post
Uninstall old R
sudo apt-get remove r-base-core
Open sources.list
sudo nano /etc/apt/sources.list
and add deb to it
deb http://cran.rstudio.com/bin/linux/ubuntu precise/
precise is your ubuntu name (may be different)
Add key to sign CRAN packages
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E084DAB9
Add specific PPA to the system
sudo add-apt-repository ppa:marutter/rdev
sudo apt-get update
sudo apt-get upgrade
installing
sudo apt-get install r-base
From R to check version
version
should give you
version.string R version 3.0.0 (2013-04-03)
Hope people will find this helpful
