Dear All
I would like to produce interaction boxplots and this seems to work:
par(mfrow=c(2,2))
A=sample(rnorm(50,50,10))
B=sample(rnorm(50,100,10))
Test=merge(A,B,by=0)#by=0 where 0 is the row.names
TreatA=(gl(2,50,100,labels=c("High","Low")))
TreatB=rep(gl(2,25,50,labels=c("High","Low")),2)
Newdata=data.frame(TreatA,TreatB,Test)
bwplot(x~TreatA:TreatB,data=Newdata)
However, I would prefer the X axis labels to be different, such that there are
two label rows (TreatA and TreatB) something like this:
TreatA High High Low Low
TreatB High Low High Low
any guidance on achieving this much appreciated.
Regards
Tom
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