ya, unfortunately k was actually a dataframe and not a matrix when it was returned from the function, which explains why I got unexpected results
On Sun, Sep 5, 2010 at 12:21 AM, <bill.venab...@csiro.au> wrote: > Is this all you want? > > > j <- matrix(nrow=10,ncol=10) > > k <- matrix(seq(1:50), ncol=10) > > row.names(k) <- seq(2,10,by=2) > > > > row.names(j) <- 1:10 > > j[row.names(k), ] <- k > > > > j > [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] > 1 NA NA NA NA NA NA NA NA NA NA > 2 1 6 11 16 21 26 31 36 41 46 > 3 NA NA NA NA NA NA NA NA NA NA > 4 2 7 12 17 22 27 32 37 42 47 > 5 NA NA NA NA NA NA NA NA NA NA > 6 3 8 13 18 23 28 33 38 43 48 > 7 NA NA NA NA NA NA NA NA NA NA > 8 4 9 14 19 24 29 34 39 44 49 > 9 NA NA NA NA NA NA NA NA NA NA > 10 5 10 15 20 25 30 35 40 45 50 > > > > > > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf Of steven mosher > Sent: Sunday, 5 September 2010 5:10 PM > To: r-help > Subject: [R] merging two maxtrices > > j<-matrix(nrow=10,ncol=10) > k<-matrix(seq(1:50), ncol=10) > row.names(k) <- seq(2,10,by=2) > j > [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] > [1,] NA NA NA NA NA NA NA NA NA NA > [2,] NA NA NA NA NA NA NA NA NA NA > [3,] NA NA NA NA NA NA NA NA NA NA > [4,] NA NA NA NA NA NA NA NA NA NA > [5,] NA NA NA NA NA NA NA NA NA NA > [6,] NA NA NA NA NA NA NA NA NA NA > [7,] NA NA NA NA NA NA NA NA NA NA > [8,] NA NA NA NA NA NA NA NA NA NA > [9,] NA NA NA NA NA NA NA NA NA NA > [10,] NA NA NA NA NA NA NA NA NA NA > k > [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] > 2 1 6 11 16 21 26 31 36 41 46 > 4 2 7 12 17 22 27 32 37 42 47 > 6 3 8 13 18 23 28 33 38 43 48 > 8 4 9 14 19 24 29 34 39 44 49 > 10 5 10 15 20 25 30 35 40 45 50 > > is there a simple way to merge j and k By the row.names in k > > so that row named '2' is placed in the 2nd row of j.. and so forth through > 4,6,8,10 > > the actual example has a sparse k.. not evenly spaced > > so this should also be mergeable > > row.names(k) <- c(1,2,5,6,9) > k > [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] > 1 1 6 11 16 21 26 31 36 41 46 > 2 2 7 12 17 22 27 32 37 42 47 > 5 3 8 13 18 23 28 33 38 43 48 > 6 4 9 14 19 24 29 34 39 44 49 > 9 5 10 15 20 25 30 35 40 45 50 > > [[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. > [[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.
