Adrian DUSA wrote: > Dear list, > > This should be a simple one, I just cannot see it. > I need to generate a sequence of the form: > 4 5 6 13 14 15 22 23 24 > > That is: starting with 4, make a 3 numbers sequence, jump 6, then another 3 > and so on. > I can create a whole vector with: > myvec <- rep(rep(c(F, T, F), rep(3, 3)), 3) > > Then see which are TRUE: > which(myvec) > [1] 4 5 6 13 14 15 22 23 24 > > > I'd like to avoid creating the whole vector if possible; for very large ones > it can be time consuming. There should be a way to only create the proper > indexes... > > Thanks for any hint, > Adrian > Is this it?
> as.vector(outer(0:2,seq(4,22,9),"+")) [1] 4 5 6 13 14 15 22 23 24 -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-help@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 and provide commented, minimal, self-contained, reproducible code.
