Dear Ayyappa Unique identifiers can be created from numbers using factor. These are coded as integers in R which you could use to relabel your dataset.
> x <- rep(1000000006:1000000008, each = 2) > x [1] 1000000006 1000000006 1000000007 1000000007 1000000008 1000000008 > y <- factor(x) > levels(y) [1] "1000000006" "1000000007" "1000000008" > z <- as.numeric(y) > z [1] 1 1 2 2 3 3 Regards, Chris Campbell MANGO SOLUTIONS Data Analysis that Delivers +44 1249 767700 -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Ayyappa Chaturvedula Sent: 11 January 2012 16:12 To: r-help@r-project.org Subject: [R] Generating unque patient IDs Dear group, I am trying to prepare a NONMEM friendly dataset for population PK analysis. My patient IDs are 10 digit long and NONMEM is losing precison and rouding the last couple of digits. I need to generate unique Patient IDs fromt he current 10-digit IDs. Ihave total 250 subjects so I appreciate if anybody can suggest me a way to code this in R. Regards, Ayyappa [[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. LEGAL NOTICE This message is intended for the use o...{{dropped:10}} ______________________________________________ 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.
