[R] repeated measure one way anova

[JohnLi]

Thanks a lot ! I learn a lot about R while I solve my problem according to
those provided informatin.

John


> Dieter Menne wrote:
>> 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)
>
> There is also anova.mlm:
>
> d <- read.table("clipboard", header=T)
> Y <- as.matrix(d)
> fit1 <- lm(Y~1)
> fit0 <- lm(Y~0)
> anova(fit0, fit1, X=~1, test="Spherical")
> anova(fit0, fit1, X=~1, test="Wilks")
>
> --
>     O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
>    c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
>   (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
> ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)              FAX: (+45) 35327907
>
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