Well, %in% returns a logical vector...
So
subset(dat, ! ID %in% someID)
Also, from ?subset:
Note
that ‘subset’ will be evaluated in the data frame, so columns can
be referred to (by name) as variables in the expression
Thus, you don't need 'dat$ID', bur just 'ID' in the subset argument.
-Erik
mp.sylves...@gmail.com wrote:
Hi,
I have a question about %in% and subsettin data frames.
Say I need to keep ID 1,2,4,5, 10 from the data frame dat. I can do:
dat <- data.frame(ID = 1:10, var = 1:10)
someID <- c(1,2,4,5,10)
subset(dat, dat$ID %in% someID)
Is there a quick way to do the opposite, ie to do a subset that contains
all ID but someID? Something like %not in%, which would *remove* lines with
ID in someID?
I am asking because I need this in a more complex example where there are
multiple lines with the same ID (data in long format) and I need to remove
selected ID.
thanks,
MP
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