[R] Evaluating AIC

[Bret Collier]

R Users,
         I was just wondering if anyone has written a program (or if there 
is a package) out there that calculates the different derivations of AIC 
(e.g. AIC, AICc, QAIC, etc.) along with AIC differences (delta's), model 
likelihoods, Akaike weights and evidence ratio's (from Burnham and Anderson 
2002).

Just in a "for instance" if someone had the -2LL, sample sizes, parameter 
counts, and estimates of c_hat output from a program, is there a function 
out there that calculates the above information.  I did not see anything on 
the help pages (or in packages, but I could have missed it) and I didn't 
want to re-invent the wheel.

TIA,

Bret A. Collier
Arkansas Cooperative Fish and Wildlife Research Unit
Department of Biological Sciences  SCEN 513
University of Arkansas
Fayetteville, AR  72701
bacolli at uark.edu