Or just dim(x) <- NULL. (as matrices in base R are just vectors with a dim attribute stored in column major order)
ergo: > x [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 > x<- 1:20 ## a vector > is.matrix(x) [1] FALSE > dim(x) <- c(5,4) > is.matrix(x) [1] TRUE > attributes(x) $dim [1] 5 4 > ## in painful and unnecessary detail as dim() should be used instead > attr(x, "dim") <- NULL > is.matrix(x) [1] FALSE > x [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ## well, you get it... -- Bert On Sat, Aug 5, 2023 at 5:21 PM Iris Simmons <ikwsi...@gmail.com> wrote: > > You could also do > > dim(x) <- c(length(x), 1) > > On Sat, Aug 5, 2023, 20:12 Steven Yen <st...@ntu.edu.tw> wrote: > > > I wish to stack columns of a matrix into one column. The following > > matrix command does it. Any other ways? Thanks. > > > > > x<-matrix(1:20,5,4) > > > x > > [,1] [,2] [,3] [,4] > > [1,] 1 6 11 16 > > [2,] 2 7 12 17 > > [3,] 3 8 13 18 > > [4,] 4 9 14 19 > > [5,] 5 10 15 20 > > > > > matrix(x,ncol=1) > > [,1] > > [1,] 1 > > [2,] 2 > > [3,] 3 > > [4,] 4 > > [5,] 5 > > [6,] 6 > > [7,] 7 > > [8,] 8 > > [9,] 9 > > [10,] 10 > > [11,] 11 > > [12,] 12 > > [13,] 13 > > [14,] 14 > > [15,] 15 > > [16,] 16 > > [17,] 17 > > [18,] 18 > > [19,] 19 > > [20,] 20 > > > > > > > ______________________________________________ > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > 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 -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
