upgradeable R layout

Greetings -- I'd like to keep my R on Mac in an upgradeable way. I  
noticed that currently all packages I installed from R.app are in  
the R.framework -- are they going to be clobbered when I replace R  
2.7.2 by 2.8.0?

No, they will stay in the 2.7 folder. You can re-install them for 2.8  
by selecting "Select packages from R 2.7" in the search field of the  
Package Installer and clicking on "Install Selected".
At the same time with the upgrade, I'd also like to switch to 64  
bit.  One good page I found about it is

http://www.matthewckeller.com/html/64_bit_r_on_mac.html

That page is dangerous and incorrect (see my earlier post about it on  
this list). I would advise users to be cautious about following  
instructions blindly, you better be sure that the person knows what s/ 
he's writing about. If you feel that some instructions on CRAN or the  
R for Mac Devel page are insufficient, say so here instead of  
speculating!
It suggests that packages are installed into a separate directory by  
doing it from command line install.packages with a lib= parameter.

Now I'd like to install everything into a lib anyways, but  
preferably without having to specify lib= all the time -- is there a  
way to make my local location the default for install.packages?

Several - see "At User Level" and "As defined by .libPath()" options  
in the Package Installer.
Also -- can the R.app be tweaked to do all this, if I want to use it  
with the 64 bit and local install for packages?

What do you mean by "all this"? It already supports an easy upgrade  
between R version and custom paths so I really don't see what you're  
missing.

Cheers,
S
The idea is to make upgrading R smooth -- ideally, it would do  
update.packages(checkBuilt =
TRUE) by itself as a part of the upgrade.

Are there other ways to simplify R upgrade on Mac and/or am I  
missing something?

Cheers,
Alexy

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upgradeable R layout

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