Hi Ana,
> d=dim(A)
> d
[1] 2 4
> cbind(rep(1:d[1], each=d[2]), rep(1:d[2], d[1]))
[,1] [,2]
[1,] 1 1
[2,] 1 2
[3,] 1 3
[4,] 1 4
[5,] 2 1
[6,] 2 2
[7,] 2 3
[8,] 2 4
Thanks,
wr
* Ana <rrast...@gmail.com> [2012-01-01 23:21:12 +0100]:
> How can I extract a list of the positions in the matrix?
> > A=matrix(1:8, nrow=2,ncol=4)
> > A
> [,1] [,2] [,3] [,4]
> [1,] 1 3 5 7
> [2,] 2 4 6 8
>
>
> Something like this
>
> pos.A
>
> 1 1
> 1 2
> 1 3
> 1 4
> 2 1
> 2 2
> 2 3
> 2 4
>
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