fixed TkTable problem but I need to unistall/reinstall R....How do I manage that??

Hello,

So I need some help. I have been trying to get biocondutor to work on
my computer that has Ubuntu 11.10 running on it and I found out that I
needed to install something called TkTable before I install R. So I
did that but now I have no idea how to properly uninstall/reinstall R,
and I cannot find any sort of help with that on this site or any
other. Help...Thanks

Eric