When I was at school, several versions of R were installed by the system administrator. I encountered an error with R-3.1.0 and you need to install a new version of R for development while this error is being studied, but I do not see any documentation on how to have several parallel versions of R on the same system ti should look something like
$ ls -l /usr/lib | grep R-
lrwxrwxrwx 1 root root 8 Jun 3 09:41 R -> R-3.1.0/
drwxr-xr-x 9 root root 4096 May 15 11:56 R-3.1.0
drwxr-xr-x 9 root root 4096 May 15 11:56 R-3.0.3
$ ls -l /usr/bin | grep R-
lrwxr-xr-x 1 root root 8 Jun 3 09:41 R -> R-3.1.0
-rwxr-xr-x 9 root root 4096 May 15 11:56 R-3.1.0
-rwxr-xr-x 9 root root 4096 May 15 11:56 R-3.0.3
I do not see documentation on how to achieve this, either in R Installation and Administration , or in configure --help. I start the Gentoo system and ebuild removes or overwrites the previous version of R during installation, so I will most likely install it from the source.
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