how to compare two datasets in R>?
On Nov 2, 2010, at 2:14 AM, song song wrote:
hi, everybody, my question is: suppose I have two data sets, set A is large and have variables like ID, Gender, Income. Set B is small and suppose only has ID. Now I want to get a subset from data set A which contains ID from Set B.
Try: A[A$ID %in% B$ID, ] Or: subset(A, ID %in% B$ID)
How to do this in R>? Is there any commands to do this? Thank you [[alternative HTML version deleted]]
-- David Winsemius, MD West Hartford, CT