> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Uwe Dippel > Sent: Freitag, 29. Januar 2010 11:57 > To: r-help@r-project.org > Subject: [R] Explanation w.r.t. rbind, please! > > This is what I tried: > > > num.vec <- c(12.34,56.78,90.12,34.56) > > names(num.vec)<-c("first","second","third","fourth") > > num.vec > first second third fourth > 12.34 56.78 90.12 34.56 > > seq<-(1:4) > > num.mat<-rbind(num.vec,seq) > > num.mat > first second third fourth > num.vec 12.34 56.78 90.12 34.56 > seq 1.00 2.00 3.00 4.00 > > num.vec [3:4] > third fourth > 90.12 34.56 > > (until here I'm fine) > > > num.mat [seq] > [1] 12.34 1.00 56.78 2.00
What you (probably) want here is num.mat ["seq",] > > num.mat [num.vec] > [1] NA NA NA NA num.mat["num.vec",] and so on. You have to use tell R that you want the ROW (that's why the comma is needed) defined by the NAME "seq" or "num.vec" (that's why you need "") . Otherwise, R replaces seq by its value 1:4, so num.mat[seq] is identical to num.mat[1:4] (and num.mat[12.34] is NA of course in num.mat[num.vec]) You should have a closer look at ?Extract HTH, Michael > > num.vec [seq] > first second third fourth > 12.34 56.78 90.12 34.56 > > num.mat [num.vec] > [1] NA NA NA NA > > num.mat [-seq] > [1] 90.12 3.00 34.56 4.00 > > (and here I'm lost!) > > How could I display a row, instead of always seemingly > falling back to columns? > > Uwe > > ______________________________________________ > 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.
