Re: [ECOLOG-L] AIC scores

2011-11-28 Thread Enric Frago
>>> Hi Minda, > > >>> > > >>> AIC scores depend upon the statistical models used. I think R does the > > >>> best job of providing these scores, for example in the context of > > >>> multiple > > >>> linear regression and gen

Re: [ECOLOG-L] AIC scores

2011-11-15 Thread Gavin Simpson
;> linear regression and generalized linear models. > >>> > >>> The literature on R or on stats using R is growing rapidly. You will > >>> find > >>> readable treatments of AIC in Crawley's 2007 R book or in Zuur et > >>> al'sv2009 Mixed Effects

Re: [ECOLOG-L] AIC scores

2011-11-13 Thread Stephen Sefick
ck Foley bees, fleas, flowers, disease patfo...@csus.edu From: Minda Berbeco [mberb...@gmail.com] Sent: Wednesday, October 26, 2011 8:32 AM To: ECOLOG-L@LISTSERV.UMD.EDU Subject: [ECOLOG-L] AIC scores Hello, I am looking for recommendations for programs t

Re: [ECOLOG-L] AIC scores

2011-11-13 Thread David_Hewitt
d Anderson 2002, Models Selection and >> Multimodel Inference. >> >> >> Patrick Foley >> bees, fleas, flowers, disease >> patfo...@csus.edu >> >> From: Minda Berbeco [mberb...@gmail.com] >> Sent: We

Re: [ECOLOG-L] AIC scores

2011-11-12 Thread Michel Rapinski
trick Foley > bees, fleas, flowers, disease > patfo...@csus.edu > > From: Ecological Society of America: grants, jobs, news > [ECOLOG-L@LISTSERV.UMD.EDU] on behalf of Minda Berbeco > [mberb...@gmail.com] > Sent: Wednesday, October 26, 2011 8:32 AM > To:

Re: [ECOLOG-L] AIC scores

2011-10-27 Thread Ben Hirsch
If you want to avoid using R and would prefer calculating AIC scores with a GUI stats program, STATISTICA works quite well.

Re: [ECOLOG-L] AIC scores

2011-10-26 Thread James Novak
Burnham and Anderson (2002) provide the formulas for computing AIC from any model that generates either a log-liklihood value (Page 61) or a residual error (Page 63) so you can generate an AIC for pretty much any statistical model. SAS provides AIC as standard output on some procedures such as P

Re: [ECOLOG-L] AIC scores

2011-10-26 Thread kerry Cutler
Dear Minda I don't think that you need any special package in R. You can calculate AIC scores and weights just using some basic functions. Here is an example: ##these are some models you might want to evaluate a<-glm(rtsizeB~rtsizeA) b<-glm(rtsizeB~rtsizeA+mBIO1) c<-glm(rtsizeB~rtsizeA+mBIO18)

Re: [ECOLOG-L] AIC scores

2011-10-26 Thread Lawrence Gary Oates
Model selection using S-Plus will give AIC scores of model comparisons.  See: Statistical Computing - An Introduction to Data Analysis using S-Plus by Michael J. Crawley. On 10/26/11, Minda Berbeco wrote: > Hello, > > I am looking for recommendations for programs to use for calculating AIC >

Re: [ECOLOG-L] AIC scores

2011-10-26 Thread Foley, Patrick
RV.UMD.EDU Subject: [ECOLOG-L] AIC scores Hello, I am looking for recommendations for programs to use for calculating AIC scores. I've looked into the AICcmodavg package with R, but the associated instructional material is not clear and I have not been able to get it to work. I hear that SAS

Re: [ECOLOG-L] AIC scores

2011-10-26 Thread Manuel Spínola
Hi Minda, You can use AIC(model) or extractAIC(model) in R (base). Or take a look at the bbmle (Ben Bolker) package in R. Best, Manuel Spínola 2011/10/26 Minda Berbeco > Hello, > > I am looking for recommendations for programs to use for calculating AIC > scores. I've looked into the AICcm

[ECOLOG-L] AIC scores

2011-10-26 Thread Minda Berbeco
Hello, I am looking for recommendations for programs to use for calculating AIC scores. I've looked into the AICcmodavg package with R, but the associated instructional material is not clear and I have not been able to get it to work. I hear that SAS is good as well, but have not found a good bo