You are adding a row with name "1" each time. R just adds a suffix to make it unique. What you call indices are the *row names* of the data frame.
Suppose the row name had been "Eden". Then "Eden1" and "Eden2" make more sense than your suggestions. On Wed, 18 Feb 2004, Svetlana Eden wrote: > Hi, everybody. > This was an interesting discussion last time and it helped me a lot. > > Could you please have a look at some feature and tell me > why it was designed this way > (my questions are under #########) > > > x = c(1, 10) > > y = c(99, 55) > > d <- data.frame(x = x, y = y) > > d > x y > 1 1 99 > 2 10 55 > > add <- data.frame(x = 14, y = 99) > > add > x y > 1 14 99 > > d <- rbind(d, add) > > d > x y > 1 1 99 > 2 10 55 > 11 14 99 > ######### it would be more natural to index the rows: 1,2,3 instead of > #1,2,11 ?! > > > > d[3,1] > [1] 14 > > d[11,1] > [1] NA > ######### especially if index '11' is not functioning... You need "11": it is a row name and not a row index. > > add1 <- data.frame(x = 10, y = 87) > > d <- rbind(d, add) > ######### now I would think that the next index should be 21, BUT: > > d > x y > 1 1 99 > 2 10 55 > 11 14 99 > 12 10 87 > ######### so what is the intuition of such indexing? -- Brian D. Ripley, [EMAIL PROTECTED] 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 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
