[R] Finding an index of matrix[i,j]

Ben Bolker ben at zoo.ufl.edu
Fri Oct 26 22:15:30 CEST 2001


  which(x,arr.ind=TRUE)

On Fri, 26 Oct 2001, Wolfgang Viechtbauer wrote:

> I hope somebody can help me out with this. Let's say I have a matrix with
> i rows and j columns and I want to find the index of the row AND column of
> the maximum value in the matrix. I tried to play around with the which()
> command, but couldn't find an easy solution that didn't involve loops and
> various other inelegant approaches. I hope that there is an easy way of
> doing this. Thanks in advance for any suggestions!
>
> ------------------------------------------------------------------------
> Wolfgang Viechtbauer                       wviechtb at s.psych.uiuc.edu
> Department of Quantitative Psychology      viechtba at students.uiuc.edu
>
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