HI,
If you want both the duplicated IDs and nonduplicated IDs to be printed, ID <- sample(1:10, 10, replace=TRUE) ID # [1] 3 7 5 8 1 5 4 6 7 2 ID[!duplicated(ID)] #[1] 3 7 5 8 1 4 6 2 ID2<-c(4,4,4,3,4,1,2,5,7,4,3,2,5,9,8,12,"A1","A2","A1","B1") ID2[!duplicated(ID2)] # [1] "4" "3" "1" "2" "5" "7" "9" "8" "12" "A1" "A2" "B1" ID2<-c(4,4,4,3,4,1,2,5,7,4,3,2,5,9,8,12,12,1,3,5,8) # ID2[!duplicated(ID2)] [1] 4 3 1 2 5 7 9 8 12 I hope this is what you wanted. A.K. ----- Original Message ----- From: Weijia Wang <wwang....@gmail.com> To: r-help@r-project.org Cc: Sent: Friday, August 3, 2012 3:06 AM Subject: [R] all duplicated wanted Hi, Has anyone been able to figure out how to print all duplicated observations? I have a dataset, with patients ID, and other lab records. Some patients have multiple lab records, but 'duplicated' ID will only show me the duplicates, not the original observation. How can I print both the original one and the duplicates? Thanks ______________________________________________ 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. ______________________________________________ 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.
