Missing: a closer reading of the help page -- Value A data frame. The rows are by default lexicographically sorted on the common columns, but for sort = FALSE are in an unspecified order.
So sort = FALSE says unspecified. If you want the original order, then add a column to the dataframe with the order and then sort the result. On Mon, Nov 8, 2010 at 4:09 PM, Tal Galili <tal.gal...@gmail.com> wrote: > Hello all, > > I think I am missing something about the sorting parameter in the "match" > command/ > Here is an example: > > > a1 <- data.frame(name = c("D", "B", "C", "A", "A", "C")) > a2 <- data.frame(name = c("A", "B", "C", "D"), num = 1:4) > a1 > a2 > merge(a1, a2, sort = F, by.x = T) > > > > The result is: > > name num > 1 D 4 > 2 B 2 > 3 C 3 > 4 C 3 > 5 A 1 > 6 A 1 > > > While I wish my rows to be in the same order as in a1, they are having some > other order. > > What am I missing here? > > > Thanks. > > > ----------------Contact > Details:------------------------------------------------------- > Contact me: tal.gal...@gmail.com | 972-52-7275845 > Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | > www.r-statistics.com (English) > ---------------------------------------------------------------------------------------------- > > [[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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ 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.