thank you very much! Both the two methods work well for my data.
Best wishes, Chunyu At 2015-10-20 19:48:18, "William Dunlap" <wdun...@tibco.com> wrote: >Or use aperm() (array index permuation): > > array(aperm(x, c(2,1,3)), c(6,3)) > [,1] [,2] [,3] > [1,] 1 7 13 > [2,] 4 10 16 > [3,] 2 8 14 > [4,] 5 11 17 > [5,] 3 9 15 > [6,] 6 12 18 > >Bill Dunlap >TIBCO Software >wdunlap tibco.com > > >On Tue, Oct 20, 2015 at 11:31 AM, John Laing <john.la...@gmail.com> wrote: >>> x <- array(1:18, dim=c(3, 2, 3)) >>> x >> , , 1 >> >> [,1] [,2] >> [1,] 1 4 >> [2,] 2 5 >> [3,] 3 6 >> >> , , 2 >> >> [,1] [,2] >> [1,] 7 10 >> [2,] 8 11 >> [3,] 9 12 >> >> , , 3 >> >> [,1] [,2] >> [1,] 13 16 >> [2,] 14 17 >> [3,] 15 18 >> >>> apply(x, 3, t) >> [,1] [,2] [,3] >> [1,] 1 7 13 >> [2,] 4 10 16 >> [3,] 2 8 14 >> [4,] 5 11 17 >> [5,] 3 9 15 >> [6,] 6 12 18 >> >> >> On Tue, Oct 20, 2015 at 12:39 PM, Chunyu Dong <dongchunyu2...@163.com> >> wrote: >> >>> Hello! >>> >>> >>> Recently I am trying to transfer a large 3-dimensional array to a matrix. >>> For example, a array like: >>> , , 1 >>> [,1] [,2] >>> [1,] 1 4 >>> [2,] 2 5 >>> [3,] 3 6 >>> , , 2 >>> [,1] [,2] >>> [1,] 7 10 >>> [2,] 8 11 >>> [3,] 9 12 >>> , , 3 >>> [,1] [,2] >>> [1,] 13 16 >>> [2,] 14 17 >>> [3,] 15 18 >>> >>> >>> I would like to transfer it to a matrix like: >>> 1 7 13 >>> 4 10 16 >>> 2 8 14 >>> 5 11 17 >>> 3 9 15 >>> 6 12 18 >>> >>> >>> Could you tell me how to do it in R ? Thank you very much! >>> >>> >>> Best regards, >>> Chunyu >>> >>> >>> >>> >>> >>> [[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. >>> >> >> [[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. [[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.