I used aptitude install to install a package, Ubuntu 11.10 oneiric, that apparently I couldn\'t install because of dependencies. I removed a couple of more libraries while d
To list what you installed with aptitude type the following
xyz@sxyzcom~$ sudo apt-get remove
This should list what remains of your R install and possibly anything else missing dependencies Then you can run
xyz@sxyzcom~$ sudo apt-get autoremove
and that should get you back to square one.