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meansbydosedaytime
2012 Feb 23
2
Aggregate with Function List ?
...someone show me the coding to do this as one command, rather than
5 calls to aggregate and 4 merges. In other words, in essence, I'd like
to present to "FUN =" a list of functions, so all the summary stats come
back in one data frame. Your assistance is appreciated. Thank you.
MeansByDoseDayTime <- aggregate(as.double(DF$Concentration), by =
list(DF$Dose, DF$Day, DF$Time), FUN = mean, trim = 0, na.rm = T,
weights=NULL)
Regards,
Michael
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