[No need to post the same message twice, please.]
Try something like:
dat <- data.frame(a=sample(c("a", "b", "d", "k", "z"), 30, replace=TRUE),
b=runif(30))
subset(dat, a %in% c("a", "d", "k", "z"))
Andy
From: Tim Smith Hi, I was trying to extract certain rows from a table. For example, if the value in the first column is "a", "d", "k", or "z", then I would like to extract these rows. In other words, if the value in the column is also an element in my list (a,d,k,z), then I would like to extract the row. I've looked in the archives and the solutions I could find were restriced to the value in the row name being a single element. thanks for the help, Tim