Try: > unlist(mapply(seq, c(1,20,50), c(7,25,53))) [1] 1 2 3 4 5 6 7 20 21 22 23 24 25 50 51 52 53
-Christos > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Chris Oldmeadow > Sent: Tuesday, August 26, 2008 12:42 AM > To: r-help@r-project.org > Subject: [R] sequence with start and stop positions > > Hi, > > I have a vector of start positions, and another vector of > stop positions, > > eg start<-c(1,20,50) > stop<-c(7,25,53) > > Is there a quick way to create a sequence from these vectors? > > new<-c(1,2,3,4,5,6,7,20,21,22,23,24,25,50,51,52,53) > > the way Im doing it at the moment is > > pos<-seq(start[1],stop[1]) > > for (i in 2:length(start)){ > new<-seq(start[i],stop[i]) > pos<-c(pos,new) > } > > This works on small data, but its very inefficient on large > vectors, and is taking forever! > > Anybody no a better way? > > many thanks, > Chris > > ______________________________________________ > 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.
