R help - Dec 2009 - Running 32 bit R in terminal on Mac OS

Hello,

I am using Mac OS on R. When I start R thru the application menu I have the
option of running both the 32 bit version as well as the 64 bit version.

When I type in R in terminal I believe it starts up the 64 bit version. How
can I start the 32 bit version instead??

Saleem

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Try this in an R session:

  if(.Machine$sizeof.pointer == 4){print("32 bit")} else
{print("64
bit")}
# for me it's .... [1] "64 bit"

On Dec 24, 2009, at 1:04 PM, saleem1000 wrote:
> Hello,
>
> I am using Mac OS on R. When I start R thru the application menu
What's the "application menu"? How did you install R?
> I have the
> option of running both the 32 bit version as well as the 64 bit  
> version.
Assuming you are looking at a Finder window for the /Applications/  
directory ... What do you see?
>
> When I type in R in terminal I believe it starts up the 64 bit  
> version.
What did you type? Just "R"? Pretty sure that gets you a 32 bit
version.
> How
> can I start the 32 bit version instead??
I'm betting you are already using a 32 bit version. All this Q&A would  
be unnecessary if you included the results of sessionInfo()
>
> Saleem
>

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

saleem1000 wrote:
> 
> Hello,
> 
> I am using Mac OS on R. When I start R thru the application menu I have
> the option of running both the 32 bit version as well as the 64 bit
> version.
> 
> When I type in R in terminal I believe it starts up the 64 bit version.
> How can I start the 32 bit version instead??
> 
> Saleem
> 
> 
Set the value of the R_ARCH environment variable to either:

  /i386

or

  /x86_64

to specify which version gets run when you start R in the terminal.  A good
place to set this is by adding the following line

  export R_ARCH=/i386

to

  ~/.profile


Hope this helps!

-Charlie
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