[R-SIG-Mac] Multiple versions of R

[David Winsemius]

On Feb 9, 2009, at 9:31 AM, Simon Urbanek wrote:

>
> On Feb 9, 2009, at 3:08 , Matthew Fero wrote:
>
>> Is there a way to maintain multiple versions of R and run them  
>> using R.app?  I can see that R.framework has multiple Versions  
>> subfolders but is appears the binaries are gone.
>>
>
> It means that you have upgraded your R instead of a fresh install  
> (see the ReadMe that is displayed during the installation).  
> Therefore only files that you have added after the installation were  
> kept.
>
> If you want to keep your previous version you have the delete the  
> receipt (see the read). Alternatively on Mac OS X 10.5 you can use  
> pkgutil --forget with the package identifier (use pkuntils --pkgs |  
> grep r-project to see which R packages are installed).

That would be :
pkgutil --pkgs | grep r-project

>
>
> Note than even if you install multiple versions in parallel, you  
> should use RSwitch (or do the same manually) to switch between them  
> for reliable operation (see FAQ for details).
>
> Cheers,
> S
>

David Winsemius, MD
Heritage Laboratories
West Hartford, CT