Hi Rachel
Do you accidentally have nlme and lme4 loaded at the same time? If so then try
unloading nlme.
regards
Mike
________________________________________
From: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On Behalf Of
Dragonwalker [dragonwalker...@hotmail.com]
Sent: 23 March 2012 21:55
To: r-help@r-project.org
Subject: [R] Using MuMIn - error message
Hello,
I hope that you can bare with me. I am new to models, but I think I have a
pretty godd understanding of how to run them now, including how to use AICc
and Anova. The issue is that I have many factors that I wish to compare so
doing each one at a time would take forever.
I came across the MuMIn package and I was so excited, however I am getting
an error message and i don't know why.
Firstly it is a mixed model that I am running with lme4. The .csv file that
it comes from has more factors than I will probably use but I only listed
the ones that I wanted to test. I had also coded the ones that are labels
and not continuous data using the as.factor command and I ran the most
complex model and ran summary() and it seemed to have worked fine.
My model was:
fm2test<-lmer(Feeding~MF.vs.OF+Age.class+tide.h.l+Site+HDp+(1|Brood),
data=ABMtest.df)
and then I wanted to use the dredge command as so:
dd<-dredge(fm2test, trace=TRUE, rank="AICc", REML=FALSE)
I got an error:
Error in UseMethod("fixef") :
no applicable method for 'fixef' applied to an object of class "mer"
I have no idea how to fix this. I have looked at ?dredge but cannot find
anything there and I am very new to R so any help would be greatly
appreciated.
I want to run all the possible models using the factors and then want to
identify those models which best explain Feeding. I also have other models
to run and in addition I have more factors to use but wanted to do this
first as a test.
Could someone also advise me on a way to list all models in order and if
each model is accessible in order to compare with Anova?
Thank you so much in advance.
Rachel
--
View this message in context:
http://r.789695.n4.nabble.com/Using-MuMIn-error-message-tp4500236p4500236.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
This message (and any attachments) is for the recipient only. NERC
is subject to the Freedom of Information Act 2000 and the contents
of this email and any reply you make may be disclosed by NERC unless
it is exempt from release under the Act. Any material supplied to
NERC may be stored in an electronic records management system.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
