Beltrand was also on the mark, suggesting you add Michael Rutter's ppa to
your repository sources.

In both cases (adding  the CRAN Ubuntu repositories or Michael Rutter's
ppa), an additional package repository is added to your system's packages.
apt then checks that repository along with the other Ubuntu repositories
and exposes the relevant binary R packages that Michael Rutter is curating.

So, your IS people are correct in saying that the latest version of R
available through the Ubuntu packages is 2.13.1, but there are more up to
date R repositories to use. If you don't have the system rights to add any
additional repositories, you'll need your IS folks to add them for you.

-Tyler

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