You can just rep() it, and c() with extra data, and then matrix() it again:
> m <- matrix(c(1,4,3,6),2)
> matrix(c(rep(m, 3), c(2, 5)), nrow(m))
[,1] [,2] [,3] [,4] [,5] [,6] [,7]
[1,] 1 3 1 3 1 3 2
[2,] 4 6 4 6 4 6 5
On Sun, Feb 21, 2010 at 10:58 AM, wendy <[email protected]> wrote:
>
> Hi all,
>
> I have a matrix, for example
> [,1] [,2]
> [1,] 1 3
> [2,] 4 6
>
> I want to replicate the matrix twice and add an extra column at the end,
> which is
> [,1] [,2] [,3] [,4] [,5] [,6] [,7]
> [1,] 1 3 1 3 1 3 2
> [2,] 4 6 4 6 4 6 5
>
> I found 'rep' only works for vector. Does anyone know how to replicate a
> matrix, and append the matrix?
>
> Thank you in advance,
> Wendy
>
>
> --
> View this message in context:
> http://n4.nabble.com/replicate-matrix-tp1563337p1563337.html
> Sent from the R help mailing list archive at Nabble.com.
>
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