[R-sig-ME] update groupedData

Martin Henry H. Stevens HStevens at muohio.edu
Sun Jun 1 14:42:25 CEST 2008

Hi folks,
I am using nlme 3.1-88
I am trying to update a groupedData object (the Oats data set), and  
change the formula and the order of the groups.
However, my code (below) fails to reorder the data.

tmp <- subset(Oats, nitro==0)
Controls <- update(Oats, yield~1|Block, data=tmp, FUN=mean)
dotplot(Block ~ yield, data=Controls, type=c('p', 'l') )

Any thoughts are appreciated.


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