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mets
2005 Jul 12
4
Calculation of group summaries
I know R has a steep learning curve, but from where I stand the slope
looks like a sheer cliff. I'm pawing through the available docs and
have come across examples which come close to what I want but are
proving difficult for me to modify for my use.
Calculating simple group means is fairly straight forward:
data(PlantGrowth)
attach(PlantGrowth)
stack(mean(unstack(PlantGrowth)))