Message-ID: <CAAxdm-7x0n1hJEdSsqjYkOoosxYcBUcoQHKfepnedrbFeO1xDA@mail.gmail.com>
Date: 2011-12-27T17:29:32Z
From: jim holtman
Subject: How to create a matrix with 3 dimensions from several 2 dimensional matrice?
In-Reply-To: <1325000086220-4237360.post@n4.nabble.com>
Is this what you are after:
> x1 <- matrix(1:25, 5)
> x2 <- x3 <- x1
>
> # combine matrices, redimension and then rename
> z <- cbind(x1, x2, x3)
> dim(z) <- c(5, 5, 3)
> z # without names
, , 1
[,1] [,2] [,3] [,4] [,5]
[1,] 1 6 11 16 21
[2,] 2 7 12 17 22
[3,] 3 8 13 18 23
[4,] 4 9 14 19 24
[5,] 5 10 15 20 25
, , 2
[,1] [,2] [,3] [,4] [,5]
[1,] 1 6 11 16 21
[2,] 2 7 12 17 22
[3,] 3 8 13 18 23
[4,] 4 9 14 19 24
[5,] 5 10 15 20 25
, , 3
[,1] [,2] [,3] [,4] [,5]
[1,] 1 6 11 16 21
[2,] 2 7 12 17 22
[3,] 3 8 13 18 23
[4,] 4 9 14 19 24
[5,] 5 10 15 20 25
> dimnames(z) <- list(NULL, NULL, c('x1', 'x2', 'x3')) # object names
> z
, , x1
[,1] [,2] [,3] [,4] [,5]
[1,] 1 6 11 16 21
[2,] 2 7 12 17 22
[3,] 3 8 13 18 23
[4,] 4 9 14 19 24
[5,] 5 10 15 20 25
, , x2
[,1] [,2] [,3] [,4] [,5]
[1,] 1 6 11 16 21
[2,] 2 7 12 17 22
[3,] 3 8 13 18 23
[4,] 4 9 14 19 24
[5,] 5 10 15 20 25
, , x3
[,1] [,2] [,3] [,4] [,5]
[1,] 1 6 11 16 21
[2,] 2 7 12 17 22
[3,] 3 8 13 18 23
[4,] 4 9 14 19 24
[5,] 5 10 15 20 25
On Tue, Dec 27, 2011 at 10:34 AM, ali_protocol
<mohammadianalimohammadian at gmail.com> wrote:
> Hi every ?one,
>
> How is it possible ?to create a matrix with 3 dimensions from several 2
> dimensional matrice?
> Is it possible that each of "elementary/building block" matrices could be
> called by its corresponding ?original name?
>
> Thanks alot.
>
> --
> View this message in context: http://r.789695.n4.nabble.com/How-to-create-a-matrix-with-3-dimensions-from-several-2-dimensional-matrice-tp4237360p4237360.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at 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.
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.