Brian,

	Thanks for answering such an elementary question. For some reason I seem to have overwrote my 
R.app this time even though I had run commands upon installation
that I thought would prevent it. i will try either installing the R15.2 again
or doing everything in R16. Rswitch is no longer found on the Mac OS X
developers page. The link is dead.

Best wishes,
Rich

On Nov 14, 2012, at 4:49 PM, Prof Brian Ripley wrote:

> On 14/11/2012 20:26, Richard Friedman wrote:
>> Dear R-Sig-mac,
>> 
>> 	I have both the development version of R 2.16
>> and R2.15.2 on my Mac (OS 10.7.5). I only have one
>> GUI (for R2.16). I can start R windows for the 2
>> versions from the command lines. I used to be able to switch with Rswitch
>> but i don;t think that works any more. Is there a way I can get separate RGUIs
>> for the stable and development versions?
> 
> When all else fails, read the FAQ:
> 
> 'There is even a small GUI utility RSwitch available from the R for Mac devel page that allows you to select the desired version. In addition, any application embedding R (such as the R GUI) can choose to use a specific R version (in most cases) or any version. Note that R.app is compiled against a particular version of R and it may crash if RSwitch is used to change the version of R in use.'
> 
> If just using RSwitch (sic) worked for you for different minor versions of R, you were lucky.  It often has not.
> 
> You can of course do what you ask by installing (or building) separate R.app's (if that is what you mean by 'RGUI') compiled against different versions of R and running the appropriate one.  The developers do that to test changes to the R.app sources.
> 
> 
>> 
>> Thanks and best wishes,
>> Rich
>> Richard A. Friedman, PhD
>> Associate Research Scientist,
>> Biomedical Informatics Shared Resource
>> Herbert Irving Comprehensive Cancer Center (HICCC)
>> Lecturer,
>> Department of Biomedical Informatics (DBMI)
>> Educational Coordinator,
>> Center for Computational Biology and Bioinformatics (C2B2)/
>> National Center for Multiscale Analysis of Genomic Networks (MAGNet)
>> Room 824
>> Irving Cancer Research Center
>> Columbia University
>> 1130 St. Nicholas Ave
>> New York, NY 10032
>> (212)851-4765 (voice)
>> friedman@cancercenter.columbia.edu
>> http://cancercenter.columbia.edu/~friedman/
>> 
>> In memoriam, Ray Bradbury
>> 
>> 
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>> 
>> _______________________________________________
>> R-SIG-Mac mailing list
>> R-SIG-Mac@r-project.org
>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>> 
> 
> 
> -- 
> Brian D. Ripley,                  ripley@stats.ox.ac.uk
> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
> University of Oxford,             Tel:  +44 1865 272861 (self)
> 1 South Parks Road,                     +44 1865 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595


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