[R] Extract index column the max

[David Winsemius]

On Mar 28, 2012, at 11:18 AM, MSousa wrote:

>
> Hello, I have this data.frame, and i need the value the column where  
> the
> value in matrix is maximum
>
> res3
>      77 86 93 106 161
>  77  20  0  0   1   0
>  86   1 12  1   2   1
>  93   0  2  3   3   0
>  106  0  4  3  18   0
>  161  0  0  0   1  55
>
>  I use  this d<-which(res3==max(res3), arr.ind=T)
>> d
>    row col
> 161   5   5
>
> how do I return only the value 161

rownames(d)

-- 

David Winsemius, MD
West Hartford, CT