alternative to rep
rep(x, each=) was something from S4 I added to R for 1.5.0 so it has only been there for 6 months or so.
On 13 Nov 2002, Peter Dalgaard BSA wrote:
Bill Shipley <Bill.Shipley at Usherbrooke.ca> writes:
Hello. the rep(x) function replicates the vector x. I am looking for a quick way of "expanding" a vector. Here is what I mean by "expand": given: x<-c(2,5,4) If I "expand" x three times, then I will get 2,2,2,5,5,5,4,4,4. In other words, I want to keep the original ordering (2,5,4) but duplicate each of the original entries three times. Is there such a function? If not, can someone suggest a fast way of doing this?
It's easier than you think:
x <- c(2,5,4) rep(x,each=3)
[1] 2 2 2 5 5 5 4 4 4 [That one escaped me until recently, too. I used to use rep(x,rep(3,length(x))).]
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._