R help - Oct 2008 - repeated measure one way anova

Hi all,

I am a new comer for Statistics R. I am using R for one way repeated
measure anova, for example, on the following data consisting of three
groups.

I appreciate your help if anybody help me show the procedure in R.

John

c2	c3	c4
85.83	75.86	84.19
85.91	73.18	85.9
86.12	69.08	83.83
85.82	74.05	85.11
86.28	74.71	86.38
86.42	65.9	81.2
85.91	76.25	86.38
86.1	75.1	86.75
85.95	70.5	88.03
86.12	73.95	87.18

JohnLi <jli136 <at> site.uottawa.ca> writes:
> I am a new comer for Statistics R. I am using R for one way repeated
> measure anova, for example, on the following data consisting of three
> groups.
> 
> 
> c2	c3	c4
> 85.83	75.86	84.19
> 85.91	73.18	85.9
-- Arrange your data in the "long form". Do it by hand, or use
function pack, or
reshape, or package reshape.

(Assuming these are times. If these are categorical variables, better use
strings as column descriptors)



subj time conc    (do not use t or c as variable name, these are 
              "well-known functions" in R) 
A     2    85.83
A     3    75.86
A     4    84.19
B     2    85.91
....

Use package nlme, function lme. It might be a bit of an overkill for the simple
case, but always worth the effort when things get more complex

libary(nlme)
summary(lme(c~time, random=~1|subj,data=mydata)

Dieter