[R] Normality in split-plot design

[Silvano]

Hi,

I would like to test the normality of errors in an 
split-plot design using R.

I used the following program:

anava = aov(ganhos ~ Blocos + Trat*Supl + 
Error(Blocos/Trat))
summary(anava)

bartlett.test(ganhos, Trat)
bartlett.test(ganhos, Supl)

How can I test the normality of the errors?

Thanks,

--------------------------------------
Silvano Cesar da Costa
Departamento de Estatística
Universidade Estadual de Londrina
Fone: 3371-4346

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