On Aug 7, 2013, at 11:23 PM, Kevin Parent wrote: > Well that almost works, and I didn't know about duplicated() so thanks for > that. However, it only gives me the duplicated values. I need the original > ones too. So the result I want is: [g,g,m,m,s,s,t,t,u,u,u,v,v,x,x,y,y,y]. > What duplicated() gives me is [g,m,s,t,u,u,v,x,y,y]
x[ duplicated(x) | duplicated(x, fromLast=TRUE) ] -- David. > > Playing around with it, I got this but can't helping thinking there must be a > less awkward way: > set.seed(2013) > x<-sort(c(letters,letters[sample(26,10,1)])) > x<-x[duplicated(x)] > x<-sort(c(x,unique(x))) > _____ > Kevin Parent, Ph.D > Korea Maritime University > From: David Winsemius <dwinsem...@comcast.net> > To: Kevin Parent <kspar...@yahoo.com> > Cc: "r-help@r-project.org" <r-help@r-project.org> > Sent: Thursday, August 8, 2013 3:03 PM > Subject: Re: [R] Extracting only multiple occurrences > > > On Aug 7, 2013, at 10:37 PM, Kevin Parent wrote: > > > Hoping someone here can help me with this small problem. > > set.seed(2013) > > > > x<-sort(c(letters,letters[sample(26,10,1)])) > > > > This gives a vector of 36 letters with some muliples (in this case, > > g,m,s,t,u,v,x,y). Now what I need is to get rid of the ones that only occur > > once and keep the multiples. I need the opposite of the unique() function. > > I expect this should be pretty easy but I can't see it. Anyone know a > > solution? Thanks in advance! > > > > > ?duplicated > > x[ duplicated(x) ] > > > David Winsemius > Alameda, CA, USA > > > David Winsemius Alameda, CA, USA ______________________________________________ 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.
