Hi
On 10 Sep 2003 at 10:50, Paul Green wrote:
> How can I sort(decreasing) a matrix on just the first column?
> For example, I can I get
>
>8 2
>7 5
>4 1
>
> from
>
>7 5
>4 1
>8 2
I am sure in help pages for sort() is a link to order()
> mat
x y
[1,] 7 5
[2,] 4 1
[3,] 8 2
> o<-order(mat[,1],decreasing=T)
> mat[o,]
x y
[1,] 8 2
[2,] 7 5
[3,] 4 1
>
> Thanks
>
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CheersPetr Pikal
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