After I hit send, I realized an error in: > which(a %in% b) [1] 8 9 10
The above should be: > a[which(a %in% b)] [1] 8 9 10 They happen to be the same by coincidence only, given the values that I used. The first syntax returns the _indices_ of the matches, not the actual matched values themselves. Important difference. For example and clarity: > a <- 5:15 > b <- 12:20 > a [1] 5 6 7 8 9 10 11 12 13 14 15 > b [1] 12 13 14 15 16 17 18 19 20 > which(a %in% b) [1] 8 9 10 11 > a[which(a %in% b)] [1] 12 13 14 15 Sorry for the confusion. Marc ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
