From: jim holtman <jholtman_at_gmail.com>

Date: Mon, 21 May 2007 04:57:40 -0400

Date: Mon, 21 May 2007 04:57:40 -0400

Create a matrix of list:

> A = matrix(1:4,2,2)

*> B = matrix(1:25,5,5)
**> C = matrix(1,3,3)
**> D = matrix(1,4,4)
**> x <- list(A,B,C,D)
**> dim(x) <- c(2,2)
**> x[[1,1]]
*

[,1] [,2]

[1,] 1 3

[2,] 2 4

> x[[2,2]]

[,1] [,2] [,3] [,4]

[1,] 1 1 1 1 [2,] 1 1 1 1 [3,] 1 1 1 1 [4,] 1 1 1 1

On 5/21/07, Scott Hyde <hydes_at_byuh.edu> wrote:

*>
**>
*

> I'd like to have a three dimensional array of matrices. I thought I

*> could construct a five dimensional array to have the three dimensional array
**> of matrices. However, not all of the matrices in the array have the same
**> dimensions, which seems to mean I can't use a five dimensional array.
**>
**> What I'd like is this:
**>
**> A = matrix(1:4,2,2)
**> B = matrix(1:25,5,5)
**> C = matrix(1,3,3)
**> D = matrix(1,4,4)
**>
**> I'd like to construct an array for which, if I type F[1,1], it returns
**> matrix A, type F[1,2] and it returns B, type F[2,1] and it returns C, or
**> type F[2,2] and it returns D.
**>
**> Essentially, I'd like to be able to access them like they were elements of
**> a matrix. Although this example is only a two dimensional array of
**> matrices, I'd like it to also work with three dimensions also.
**>
**> The only thing I thought of to try was to make an array of lists and store
**> the matrices inside of an array of lists (where each matrix is stored as a
**> list with one item).
**>
**> Any suggestions?
**>
**> -Scott
**>
**> ______________________________________________
**> R-help_at_stat.math.ethz.ch 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 Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ R-help_at_stat.math.ethz.ch 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.Received on Mon 21 May 2007 - 09:04:59 GMT

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