Hi: Try this:
S1 <- sample(10001:98999, 1000) S2 <- sample(10001:98999, 1000) > intersect(S1, S2) # lists have some overlap [1] 72484 82292 93508 50438 29603 28965 68063 79598 16497 43016 22119 # test list x <- sample(10001:98999, 1000) # tests first if x is in S1; if not, test whether it's in S2 res <- ifelse(x %in% S1, 1, ifelse(x %in% S2, 2, 0)) table(res) res 0 1 2 973 15 12 HTH, Dennis On Wed, Feb 2, 2011 at 12:49 PM, DHIMAN BHADRA <dhimanbha...@gmail.com>wrote: > Hello everyone, > > I am stuck with an apparently simple issue : > > i) I have two sets S1 and S2, each containing a large number of integers, > say zip codes. > ii) Now, I just want to test whether a particular zip code belong to S1 or > S2 or neither of them. > iii) If it belongs to S1, the area/region gets a particular label, say 1; > if > it belongs to S2, it gets a label 2 and if it doesnot belong to either S1 > or > S2, it gets a label 0. > iv) I have to do this for a large number of zip codes as well. > > So I was thinking of embedding it into a if else loop but I am stuck on how > to define the "belongs to" in R syntax. Any hint will be much appreciated. > Best regards, > Dhiman Bhadra > > WPI, Worcester, MA 01609 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
