[R] how update to latest version of R on mac

[Jane Synnergren]

Hi,
I get following error when trying to update the affy package to latest
version.

Error: cannot remove prior installation of package Œaffy¹

I think it is because affy requires R 3.1.1 and I have 3.0.2

I try to find a guide how I do to upgrade from 3.0.2 to latest version on
mac, but cannot find any good description. Can anyone guide me?

Do I just download R for mac (R-3.1.2-snowleopard.pkg) from
<http://ftp.sunet.se/pub/lang/CRAN/bin/macosx/R-3.1.2-snowleopard.pkg> and
dubbelclick?

What will happen with all installed packages?
I have OS X Lion 10.7.5
Which version number is stable and reliable?

I also need a guide of how to update to latest version of  bioconductor on
mac. 

Descriptions for windows is available everywhere.

/Jane


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Jane Synnergren, PhD
Systems Biology Research Center
School of Bioscience
University of Skövde
Sweden

Contact:
email: jane.synnergren at his.se
mobile: +46 (0)708 806495
webpage: his.se/synj

Postal Address: 			Visiting address:

Box 408 				Kanikegränd 3A
541 28 Skövde			Skövde