# [R] R-help

Dimitris Rizopoulos dimitris.rizopoulos at med.kuleuven.ac.be
Wed Aug 25 11:28:32 CEST 2004

```Hi Jim,

you could try this:

mat <- matrix(sample(1:25), 5, 5)
mat
row(mat)[mat==max(mat)]
col(mat)[mat==max(mat)]

I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Doctoral Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/396887
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm

----- Original Message -----
From: "Jim Gustafsson" <jgu at Codan.DK>
To: <r-help at stat.math.ethz.ch>
Sent: Wednesday, August 25, 2004 11:07 AM
Subject: [R] R-help

>
> 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?
>
> 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.
>
> Regards Jim
>
>
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```

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