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Replicate
3 messages · Marc Bernard, Dimitris Rizopoulos, Jim Porzak
look at ?unique(), e.g., x <- c(1, 1, 1, 2, 2, 2, 3, 3, 3, 3) unique(x) I hope it helps. Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/16/336899 Fax: +32/16/337015 Web: http://www.med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Marc Bernard" <bernarduse1 at yahoo.fr> To: <r-help at stat.math.ethz.ch> Sent: Friday, September 16, 2005 4:38 PM Subject: [R] Replicate
Dear All, I have a vector x = (1,1,1,2,2,2,3,3,3,3) I am looking for a function to return a vector containing the distinct elements of x i,e y = (1,2,3) The following code gives the desired results: as.numeric(levels(as.factor(x))) Is there any other elegant way? Thanks, B --------------------------------- [[alternative HTML version deleted]]
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Hi Marc,
x = c(1,1,1,2,2,2,3,3,3,3) unique(x)
[1] 1 2 3
Being a database guy myself, it took me a while to think "unique" rather than "distinct"
HTH, Jim Porzak Loyalty Matrix Inc. San Francisco, CA On 9/16/05, Marc Bernard <bernarduse1 at yahoo.fr> wrote: > Dear All, > > I have a vector x = (1,1,1,2,2,2,3,3,3,3) > I am looking for a function to return a vector containing the distinct elements of x i,e y = (1,2,3) > > The following code gives the desired results: > > as.numeric(levels(as.factor(x))) > > Is there any other elegant way? > > Thanks, > > B > > > > > --------------------------------- > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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 >