Hi, Let say I have a numeric vector: x <- c(1, 2, 3, 3). I want on one hand numbers which are not duplicated ie "1,2" and duplicated "3". so I did:>duplicated(x)FALSE FALSE FALSE TRUE> unique(x)1 2 3 which is not what I want. Is there a function in R to have the following result:>duplicated(x)FALSE FALSE TRUE TRUE>unique(x)1 2 I could do it by programming some loops but I reckon somebody programmed a function already. Cheers. -- View this message in context: http://r.789695.n4.nabble.com/unique-vs-duplicate-problem-tp4635868.html Sent from the R help mailing list archive at Nabble.com.
Here is one way of doing it -- you can create your own functions:> x <- c(1, 2, 3, 3) > > allDup <-+ function (value) + { + duplicated(value) | duplicated(value, fromLast = TRUE) + }> > duped <- unique(x[allDup(x)]) > duped[1] 3> > setdiff(unique(x), duped)[1] 1 2> >On Mon, Jul 9, 2012 at 12:42 PM, Nico902 <descostes at ciml.univ-mrs.fr> wrote:> Hi, > > Let say I have a numeric vector: x <- c(1, 2, 3, 3). > > I want on one hand numbers which are not duplicated ie "1,2" and duplicated > "3". > > so I did: > >>duplicated(x) > FALSE FALSE FALSE TRUE >> unique(x) > 1 2 3 > > which is not what I want. Is there a function in R to have the following > result: > >>duplicated(x) > FALSE FALSE TRUE TRUE >>unique(x) > 1 2 > > I could do it by programming some loops but I reckon somebody programmed a > function already. > > Cheers. > > > > -- > View this message in context: http://r.789695.n4.nabble.com/unique-vs-duplicate-problem-tp4635868.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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.-- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it.
Hello, Maybe this function. fun <- function(x) x %in% x[duplicated(x)] x <- c(1, 2, 3, 3) fun(x) Hope this helps, Rui Barradas Em 09-07-2012 17:42, Nico902 escreveu:> Hi, > > Let say I have a numeric vector: x <- c(1, 2, 3, 3). > > I want on one hand numbers which are not duplicated ie "1,2" and duplicated > "3". > > so I did: > >> duplicated(x) > FALSE FALSE FALSE TRUE >> unique(x) > 1 2 3 > > which is not what I want. Is there a function in R to have the following > result: > >> duplicated(x) > FALSE FALSE TRUE TRUE >> unique(x) > 1 2 > > I could do it by programming some loops but I reckon somebody programmed a > function already. > > Cheers. > > > > -- > View this message in context: http://r.789695.n4.nabble.com/unique-vs-duplicate-problem-tp4635868.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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. >
excellent!!! thanks a lot!! -- View this message in context: http://r.789695.n4.nabble.com/unique-vs-duplicate-problem-tp4635868p4635874.html Sent from the R help mailing list archive at Nabble.com.
Hi, Try this: #Duplicated: x<-c(1:3,3) x==x[duplicated(x)] #[1] FALSE FALSE? TRUE? TRUE #Unique: ?x[!x==x[duplicated(x)]] #[1] 1 2 A.K. ----- Original Message ----- From: Nico902 <descostes at ciml.univ-mrs.fr> To: r-help at r-project.org Cc: Sent: Monday, July 9, 2012 12:42 PM Subject: [R] unique vs duplicate problem Hi, Let say I have a numeric vector:? x <- c(1, 2, 3, 3). I want on one hand numbers which are not duplicated ie "1,2" and duplicated "3". so I did:>duplicated(x)FALSE FALSE FALSE TRUE> unique(x)1 2 3 which is not what I want. Is there a function in R to have the following result:>duplicated(x)FALSE FALSE TRUE TRUE>unique(x)1 2 I could do it by programming some loops but I reckon somebody programmed a function already. Cheers. -- View this message in context: http://r.789695.n4.nabble.com/unique-vs-duplicate-problem-tp4635868.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help at 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.