Hi Nick, On Tue, May 1, 2012 at 1:56 PM, Nick Switanek <nswita...@gmail.com> wrote: > Thank you, Steve and Sarah, for your swift replies. > > I didn't know about dput(). class() returns "matrix" for A, B, and C, but > here: > >> class(A) > [1] "matrix" >> class(B) > [1] "matrix" >> dput(A) > structure(list(1239814462, 1239814601, 14349, 3, 4, 0, 12, 46601, > 17801, 12401, 106001), .Dim = c(1L, 11L), .Dimnames = list( > NULL, c("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", > "k")))
I'm not sure how you created A, but it's a list - see the structure given by dput(), and also: > is.list(A) [1] TRUE > is.list(B) [1] FALSE >> dput(B) > structure(c(1239197400, 1239199200, 1239202800, 1239199199, 1239202799, > 1239206399, 14342, 14342, 14342, 3, 3, 3, 0, 0, 0, 0, 0, 0, 9, > 10, 11, 35999, 39599, 43199, 7199, 10799, 14399, 1799, 5399, > 8999, 1799, 5399, 8999), .Dim = c(3L, 11L), .Dimnames = list( > NULL, c("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", > "k"))) Note that the structure for B doesn't say anything about it being a list. In this particular case, you can fix that with: > rbind(unlist(A), B) a b c d e f g h i j k [1,] 1239814462 1239814601 14349 3 4 0 12 46601 17801 12401 106001 [2,] 1239197400 1239199199 14342 3 0 0 9 35999 7199 1799 1799 [3,] 1239199200 1239202799 14342 3 0 0 10 39599 10799 5399 5399 [4,] 1239202800 1239206399 14342 3 0 0 11 43199 14399 8999 8999 But now I'm curious where A came from. Sarah >> C <- rbind(A,B) >> dput(C) > structure(list(1239814462, 1239197400, NULL, NULL, 1239814601, > 1239199200, NULL, NULL, 14349, 1239202800, NULL, NULL, 3, > 1239199199, NULL, NULL, 4, 1239202799, NULL, NULL, 0, 1239206399, > NULL, NULL, 12, 14342, NULL, NULL, 46601, 14342, NULL, NULL, > 17801, 14342, NULL, NULL, 12401, 3, NULL, NULL, 106001, 3, > NULL, NULL), .Dim = c(4L, 11L), .Dimnames = list(NULL, c("a", > "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"))) > > But how do I convert A to the appropriate form for rbinding? Not simply > with as.matrix(). Witness: >> dput(as.matrix(A)) > structure(list(1239814462, 1239814601, 14349, 3, 4, 0, 12, 46601, > 17801, 12401, 106001), .Dim = c(1L, 11L), .Dimnames = list( > NULL, c("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", > "k"))) > > I think we're closer but I still need your help! > > Nick > > > On Tue, May 1, 2012 at 12:02 PM, Steve Lianoglou < > mailinglist.honey...@gmail.com> wrote: > >> Hi, >> >> On Tue, May 1, 2012 at 11:52 AM, Nick Switanek <nswita...@gmail.com> >> wrote: >> > Good morning, >> > >> > I'm running into trouble rbind-ing numeric matrices with differing >> numbers >> > of rows. In particular, there seem to be issues whenever a one-row >> numeric >> > matrix is involved. >> > >> > Assume A is a numeric matrix with 1 row and Y columns and B is a numeric >> > matrix with X rows and Y columns. Let C be the result of rbinding A and >> B. >> > Then C is a numeric matrix with X + 1 rows and Y columns, only instead of >> > the rows of B being "stacked" beneath the row of A as expected, the >> first Y >> > elements of the 1st column of B are placed in the 2nd row of C, the >> > remaining values of B are discarded, and NULL values fill out the rest of >> > the matrix C. >> > >> > The number of columns of A and B match. The colnames of A and B match. >> Both >> > are numeric matrices. I've pored over the rbind/cbind documentation but >> > can't identify why I'm getting this behavior from rbind. I'd be extremely >> > grateful for your suggestions or thoughts. >> >> If everything you say is true (and I'm understanding what you're >> saying), there must be something else going on with your data. >> Consider: >> >> R> m1 <- matrix(-(1:5), nrow=1) >> R> m2 <- matrix(1:20, ncol=5) >> R> rbind(m1, m2) >> [,1] [,2] [,3] [,4] [,5] >> [1,] -1 -2 -3 -4 -5 >> [2,] 1 5 9 13 17 >> [3,] 2 6 10 14 18 >> [4,] 3 7 11 15 19 >> [5,] 4 8 12 16 20 >> >> Can you provide a small example of your data that reproduces the >> problem you're seeing? >> >> Construct these objects in your workspace and copy/paste the output of >> dput on your m1 and m2 matrices so we can easily work w/ them. >> >> Cheers, >> -steve >> -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.