Hi,
tail(x,2) or x[seq(nrow(x)-1, nrow(x)), ] HTH, baptiste 2009/9/14 Peng Yu <pengyu...@gmail.com> > Hi, > > x=matrix(1:60,nr=6) > > I can refer the last 2 rows by > x[5:6,] > > If I don't know the total number of rows is 6, is there a way to refer > the last 2 rows? > > Regards, > Peng > > ______________________________________________ > 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. > -- _____________________________ Baptiste Auguié School of Physics University of Exeter Stocker Road, Exeter, Devon, EX4 4QL, UK http://newton.ex.ac.uk/research/emag ______________________________ [[alternative HTML version deleted]]
______________________________________________ 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.
