Dear All, I would like to ask a question about how to locate the indices after comparing two numeric vectors. Say, I have, A <- c(1,2,3,4) and A <- c(0,3,1,5) and we cmpare: > idx <- A<B So: > idx [1] FALSE TRUE FALSE TRUE
Question 1: I would like to get a vector that stores the indices for entries of A such that this relationship is true. In this case, a vector idx1 < c(2,4), because the 2nd and 4th entries of A satisfy the conditions Question 2: I would like to know the maximum index of the entry in A for which the relationship is true. In this case, max_indx = 4, since the 4th entry of A is such. Could you please give me some hints? Thank you, -Chee [[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.