R help - Mar 2010 - Help needed: Split-split plot analysis

Hello,
I am very new to R but would like to use the software to analyse the
attached data. The experiment followed a split-split plot design
There were two blocks and the whole plot is CO2 with two levels. The
sub-plot is soil temperature with three levels and the sub-sub plot is soil
moisture content with three levels (low, intermediate and high-similar for
soil temperature). I had 7 plants per treatment combination and 252 plants
in total. CO2, soil temperature and moisture are fixed factors. Blocks are
always random.
What package do I need to perform a split-split plot analysis? Can someone
help me with the code for the analysis? Thank you.


Sincerely,

Forest Member

It looks like you need something like this.  The data you attached didn't
make
it through the email system.

## you might need
install.packages("HH")  ## do this once

library(HH)  ## do this every time you start a new R session
interaction2wt(y ~ Block + CO2 + temp + moisture)

## the rest is standard R from the stats package
safe.aov <- aov(y ~ CO2*temp*moisture + Error(Block/CO2), data=safe)
model.tables(safe.aov)
anova(safe.aov)


Rich

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