How to create a matrix with 3 dimensions from several 2 dimensional matrice?

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

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.

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