RStudio for Ubuntu 12.04

There are many editors to R, like JGR, Emacs + ESS, Rattle (for data mining), Tinn-R, but I personally like RStudio for many reasons. I shall explain about how to install R and RStudio in Ubuntu 12.04 here:

1. First obtain a copy of RStudio from here.
2. go to update manager -> settings -> add below apt sources:

        deb http:///bin/linux/ubuntu precise/
        if you are in India; possibly your favorite CRAN mirror can be: http://ftp.iitm.ac.in/cran/; for more mirror, you can peep in to this page.
3. go to terminal; alternatively you can also click ctl+alt+t, to trigger gnome-terminal; then add apt-key with the help of below commands;

gpg --keyserver keyserver.ubuntu.com --recv-key E084DAB9  

and  

gpg -a --export E084DAB9 | sudo apt-key add -

now update your software sources (respective repositories) with below commands;

sudo apt-get update 

sudo apt-get install r-base

now after installation - install your previously downloaded RStudio package with the

help of software center 

That's all now your RStudio (much coveted IDE for R) is ready.