Hi R-people
I have a question concerning subsetting. I have a dataframe which contains among other variables the variable "subject". For each subject number there are several rows, e.g.: subject treatment concentration day 19 a 15,4 1 19 a 18,3 2 19 a 2,3 3
etc.
Im trying to subset the dataframe to get for example only the rows of subject 19 and subject 15. I tried this with
nameofdataframe[nameofdataframe$subject==c(19,15),]
This doesnt work as i get less rows than i should and a warning as well. How can i succeed doing this?
Thanks a lot
Gabi
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See ?"%in%"
as in
nameofdataframe$subject %in% c(19,15)
Uwe Ligges
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