On Wed, 25 Aug 2004 11:07:24 +0200
Jim Gustafsson <[EMAIL PROTECTED]> wrote:
>
> Dear R users,
>
> I have just start working with R and would need some help.
>
> If you have a matrix as:
>
>
> [,1] [,2] [,3]
> [1,] 11 24 11
> [2,] 16 29 16
> [3,] 2 15 2
>
> and you want the position where you can find the maximum value, in this
> case row 2 and column 2.
> How could you get the position?
> mat <- matrix(c(11,16,2,24,29,15,11,16,2), ncol = 3)
> mat
[,1] [,2] [,3]
[1,] 11 24 11
[2,] 16 29 16
[3,] 2 15 2
> which(mat == max(mat), arr.ind = TRUE)
row col
[1,] 2 2
> The values in the matrix is likelihood function values, and each row and
> column represent values from two parameters. So the idea is to seek which
> parameter values maximise the likelihood and therefore I need boot row and
> column position.
HTH,
Tobias
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