Dear R-helpers, I have a question about giving index. Suppose that I have a vector say, id=1:5, and each of them have some given index but some of them may share the same index Now, I have another vector, and I want to give it a index based what just defined.
# 5 subjects test1=1:5 # corresponding index, so here, subject 2 and subject 4 share the common index "1" index=c(3,1,2,1,4) # now I have another vector, and I want to use the index defined above test2=c(5,4,2,1,1,5,3) ## so, the result should be something like this--index of test2 is (4,1,1,3,3,4,2) How can I program this ? Any help will be highly appreciated. Thank you all, Carrie [[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.