R help - Oct 2008 - Advice on Computer Specifications

Hello

I'm running into a variety of limitations with my computer complaining that
it doesn't  have sufficient memory.   It is a Dell Latitude D630 Duo Core
CPU T7700 @ 2.40 GHz, with 3.50 GB RAM.

I'm working with relatively large dataframes
> dim(AllYears)
    returns 4071840 records with 13variables
sometimes this complains that it can not allocate vectors of 16.0 Mb and
will not return the values, of course this is a minor example of the
limitations I'm dealing with.

Can anyone recommend a better solution for a computer?

I also have access to a desktop Linux machine running RedHat Linux with
roughly 3.0 GB of RAM.  I have not yet installed R on this platform to test
whether the applications will run smother there.


Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034

Office (305) 224 - 4282
Steve_Friedman at nps.gov

Hi all

I'm trying to immigrate from Stata and I want to preform a IIA test
(Independence of Irrelevant Alternatives) on my multinomial logit model
in R, but I can't seem to find a package that dos the trick. I've been
looking at
http://bm2.genes.nig.ac.jp/RGM2/R_current/library/systemfit/man/hausman.systemfit.html
but I can't figure out what to do! I normally just type 'mlogtest,
hausman base' to get the test in Stata. I can even use 'mlogtest,
smhsiao base' to get the Small-Hsiao tests of IIA assumption. 

according to the literature there is also other tests.. thou I cant seem
to find any off them in R. 

Thank for the help.

Erika