[EMAIL PROTECTED] wrote:
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
Or
subset(nameofdataset, subject %in% c(15,19))
which does the right thing if subject should be missing (unlikely in
this
example I know, but likely to be a different story if conditioning on
concentration, say).
A pity subset() and transform() are not mentioned in the subsetting
section
of
