How about, say, order()? Did you even try to look
in the help, under sort or order since both appear
as keywords in your question?
> dput(x)
structure(list(V1 = c(57L, 84L, 21L, 61L), V2 = c(91L, 3L, 6L,
16L), V3 = c(31L, 99L, 57L, 84L), V4 = c(61L, 85L, 91L, 3L),
V5 = c(16L, 47L, 31L, 99L)), .Names = c("V1", "V2", "V3",
"V4", "V5"), class = "data.frame", row.names = c(NA, -4L))
> order(x[,1])
[1] 3 1 4 2
>
> x[order(x[,1]),]
V1 V2 V3 V4 V5
3 21 6 57 91 31
1 57 91 31 61 16
4 61 16 84 3 99
2 84 3 99 85 47
Sarah
On Wed, Mar 7, 2012 at 2:20 PM, Ajay Askoolum <aa2e...@yahoo.co.uk> wrote:
> be sorted by row in ascending/descending order?
>
> Given this matrix:
>
> 57 91 31 61 16
> 84 3 99 85 47
> 21 6 57 91 31
> 61 16 84 3 99
>
>
> I want to end with this:
>
> 21 6 57 91 31
> 57 91 31 61 16
> 61 16 84 3 99
> 84 3 99 85 47
>
>
> The 'order' of the sort is: 3 1 4 2
>
> Also, what R expression will give me the 'order'?
>
--
Sarah Goslee
http://www.functionaldiversity.org
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