Thank you all for your insight! I am glad to hear, at least, that I am doing
something incorrectly (since the results do not make sense), and I am very
grateful for your attempts to remedy my very limited (and admittedly
self-taught) understanding of multilevel models and R.
As I mentioned in th
On Mon, Sep 7, 2009 at 10:34 AM, Alain Zuur wrote:
>
>
>
> rapton wrote:
>>
>> Hello,
>>
>> I am using R to analyze a large multilevel data set, using
>> lmer() to model my data, and using anova() to compare the fit of various
>> models. When I run two models, the output of each model is generated
rapton wrote:
>
> Hello,
>
> I am using R to analyze a large multilevel data set, using
> lmer() to model my data, and using anova() to compare the fit of various
> models. When I run two models, the output of each model is generated
> correctly as far as I can tell (e.g. summary(f1) and summ
rapton wrote:
>
> Hello,
>
> I am using R to analyze a large multilevel data set, using
> lmer() to model my data, and using anova() to compare the fit of various
> models. When I run two models, the output of each model is generated
> correctly as far as I can tell (e.g. summary(f1) and summ
erent fixed effects. "
> >>
> >> (from ?anova.lme in the nlme package).
> >>
> >> Are you using the REML = TRUE default?
> >>
> >> Bert Gunter
> >> Genentech Nonclinical Statistics
> >>
> >> -Original Messa
: [R] Using anova(f1, f2) to compare lmer models yields
seemingly erroneous Chisq = 0, p = 1
> Hi Bert,
>
> Thank you for your note! I tried changing the REML default, and it
> still produces the same result (see below). Is that what you meant
> for me to try?
>
> Incidentally,
help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> On
> Behalf Of rapton
> Sent: Friday, September 04, 2009 9:10 AM
> To: r-help@r-project.org
> Subject: [R] Using anova(f1, f2) to compare lmer models yields seemingly
> erroneous Chisq = 0, p = 1
>
>
> He
--Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of rapton
Sent: Friday, September 04, 2009 9:10 AM
To: r-help@r-project.org
Subject: [R] Using anova(f1, f2) to compare lmer models yields seemingly
erroneous Chisq = 0, p = 1
Hello,
I am using R
Hello,
I am using R to analyze a large multilevel data set, using
lmer() to model my data, and using anova() to compare the fit of various
models. When I run two models, the output of each model is generated
correctly as far as I can tell (e.g. summary(f1) and summary(f2) for the
multilevel mode
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