?match ix<-df$index ## just for clarity
df[match(x,ix),] -- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA "The business of the statistician is to catalyze the scientific learning process." - George E. P. Box > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of cstrato > Sent: Monday, December 13, 2004 11:03 AM > To: [EMAIL PROTECTED] > Subject: [R] How to duplicate rows in dataframe? > > Dear all: > > I have the following (simple?) problem: > Consider a dataframe where the first column contains > integers used as index, e.g. > index > 24 > 13 > 46 > 32 > > Now I have the following vector used to sort the dataframe: > x <- c(13,24,32,46) > Sorting the dataframe can be done by using order. > > However consider the following vector: > x <- c(13,32,13,24,46,24,24) > Now I want to get the dataframe in the order of the rows > defined in x, i.e. the dataframe contains duplicate rows. > One way to achieve this would be to use rbind in a for-loop. > > My question is: > Is there an easier and - more important - faster way to > obtain the dataframe as defined in x? > > Thank you in advance. > Best regards > Christian > _._._._._._._._._._._._._._._._ > C.h.i.s.t.i.a.n S.t.r.a.t.o.w.a > V.i.e.n.n.a A.u.s.t.r.i.a > _._._._._._._._._._._._._._._._ > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html