On Wed, 2009-01-07 at 16:22 +0100, Niccolò Bassani wrote: > Dear R users,I'm facing a trivial problem, but I really can't solve it. I've > tried a dozen of codes, but I can't get the result I want. > The question is: I have a dataframe like this one > > [,1] [,2] [,3] [,4] [,5] > [1,] 1 2 3 4 5 > [2,] 2 5 5 4 9 > [3,] 1 6 8 1 2 > [4,] 8 6 4 1 5 > > made up of decimal numbers, of course. > I want to append this dataframe to itself a number x of times, i.e. 3. That > is I want a dataframe like this > > > [,1] [,2] [,3] [,4] [,5] > [1,] 1 2 3 4 5 > [2,] 2 5 5 4 9 > [3,] 1 6 8 1 2 > [4,] 8 6 4 1 5 > [5,] 1 2 3 4 5 > [6,] 2 5 5 4 9 > [7,] 1 6 8 1 2 > [8,] 8 6 4 1 5 > [9,] 1 2 3 4 5 > [10,] 2 5 5 4 9 > [11,] 1 6 8 1 2 > [12,] 8 6 4 1 5 > > I'm searching for an "authomatic" way to do this (I've already used the > rbind re-writing x times the name of the frame...), as it must enter a > function where one argument is exactly the number x of times to repeat this > frame. > > Any ideas?? > Thanks in advance!
Hello, If your matrix is kk <- matrix( 1:16, 4, 4) You can do kkk <- lapply( 1:5, function(x) kk ) do.call(rbind, kkk) You can write your code in a single line, though. I used 5 here as a matter of example. You can build a function on these lines with an arbitrary argument if need be. Carlos J. Gil Bellosta http://www.datanalytics.com > Niccol > > [[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. ______________________________________________ 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.