[R] Matrix from a vector?

[Gabor Grothendieck]

Try this:

matrix(rhset[outer(1:8, 1:8, "-") %% 8 + 1], 8)


On 9/21/06, kone <attenka at utu.fi> wrote:
> Hi,
>
> Is there some function, which generates this kind of n x n -matrix
> from a vector?
>
>  > rhset
> [1]  1792   256 13312   512  1024  2048  8192  4096
>  >      m=matrix(nrow=length(rhset),ncol=length(rhset))
>  >      for(i in 1:length(rhset))
> +       {
> +               m[,i]=rhset
> +               rhset=c(rhset[length(rhset)], rhset[2:length(rhset)-1])
> +       }
>  > m
>       [,1]  [,2]  [,3]  [,4]  [,5]  [,6]  [,7]  [,8]
> [1,]  1792  4096  8192  2048  1024   512 13312   256
> [2,]   256  1792  4096  8192  2048  1024   512 13312
> [3,] 13312   256  1792  4096  8192  2048  1024   512
> [4,]   512 13312   256  1792  4096  8192  2048  1024
> [5,]  1024   512 13312   256  1792  4096  8192  2048
> [6,]  2048  1024   512 13312   256  1792  4096  8192
> [7,]  8192  2048  1024   512 13312   256  1792  4096
> [8,]  4096  8192  2048  1024   512 13312   256  1792
>
>
> Atte Tenkanen
> University of Turku, Finland
>
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