R help - Jun 2003 - (no subject)

Hello, 

I'm trying to write code for a repeated measures ANOVA.  To put things in 
perspective, I'll describe my experiment (briefly).  I have a 2X2 factorial 
design with pH (5.5, 6.5) and local community (present, absent) as my
treatments.
I had plastic enclosures that I sampled across five weeks with the density of 
7 species acting as my response variables.  I'm analyzing one species at a 
time and doing Bonferonni corrections after the analysis.  I've attached an 
example of one of my data files showing the treatments and the change in density
(of one species) over 5 weeks.  Hopefully someone can shed some light on this 
question: how to write a repeated measures ANOVA code in R?  Thanks.  Hope to 
hear soon.

Jessie Binks

You can email a response to: jbinks at utm.utoronto.ca



    
    

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Dear Jessie,

Why don't you try to use already written functions? Probably lme (in package
nlme) would be what you need. lme comes with documentation, and there is a 
whole book devoted to it.

Best,

Ram?n

P.S. It is helpful if you use the "Subject" line, so that people now
what your
message is about, and so that messages can be stored and searched by subject.




On Tuesday 17 June 2003 15:48, Binksjess at aol.com
wrote:
> Hello,
>
> I'm trying to write code for a repeated measures ANOVA.  To put things
in
> perspective, I'll describe my experiment (briefly).  I have a 2X2
factorial
> design with pH (5.5, 6.5) and local community (present, absent) as my
> treatments. I had plastic enclosures that I sampled across five weeks with
> the density of 7 species acting as my response variables.  I'm
analyzing
> one species at a time and doing Bonferonni corrections after the analysis. 
> I've attached an example of one of my data files showing the treatments
and
> the change in density (of one species) over 5 weeks.  Hopefully someone can
> shed some light on this question: how to write a repeated measures ANOVA
> code in R?  Thanks.  Hope to hear soon.
>
> Jessie Binks
>
> You can email a response to: jbinks at utm.utoronto.ca
-- 
Ram?n D?az-Uriarte
Bioinformatics Unit
Centro Nacional de Investigaciones Oncol?gicas (CNIO)
(Spanish National Cancer Center)
Melchor Fern?ndez Almagro, 3
28029 Madrid (Spain)
Fax: +-34-91-224-6972
Phone: +-34-91-224-6900

http://bioinfo.cnio.es/~rdiaz