I am trying to update my installation of the R statistical program from V2.10 to 2.11. I have run sudo apt-get install r-base, and get back a message saying that the most recent version is installed. However, when I open the program it is still 2.10. I need 2.11 in order to install some new packages. Any ideas? I am a relatively new Ubuntu user (transitioning from Windows) and still struggle a bit with software installation. Thanks.