Re: [R] Can I use "lme" to deal with grouping data when I only get one data point per group?

From: Dieter Menne <dieter.menne_at_menne-biomed.de>
Date: Thu 15 Sep 2005 - 06:08:44 EST

Ruixiao Lu <tinypenguin <at> gmail.com> writes:

> I have a question for using "lme". Say, I have 6 data points and they belong
> to six groups (one group factor). So there is no replicates for each group
> and I cannot separate the with-in group variation from the between group
> variation.
> But when I try to use "lme" to deal with it, it gave the answers for both
> with-in group variation and the between group variation! The statement is as
> below:

((Slightly modified by DM))

fac=as.factor(c(1:6))
y=c(-0.3465181, -0.2019839, -0.7610653, -0.1992943, -0.1663348, 0.2811794) data.y=data.frame(y,fac)
y.g=groupedData(y~1|fac)
intervals(y.g) ## and you will see ....

Similar example on page 27 of Pinheiro/Bates

Dieter Menne



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