[R] indices of rows containing one or more elements >0

[jim holtman]

Is this what you are after?

> test <- matrix(c(0,2,0,1,3,5), 3,2)
> (x <- which(test > 0, arr.ind=TRUE))
     row col
[1,]   2   1
[2,]   1   2
[3,]   2   2
[4,]   3   2
> unique(x[, 'row'])
[1] 2 1 3
>


On Feb 12, 2008 9:40 PM, Ng Stanley <stanleyngkl at gmail.com> wrote:
> Hi,
>
> Given test <- matrix(c(0,2,0,1,3,5), 3,2)
>
> > test[test>0]
> [1] 2 1 3 5
>
> These are values >0
>
> > which(test>0)
> [1] 2 4 5 6
>
> These are array indices of those values >0
>
> > which(apply(test>0, 1, all))
> [1] 2
>
> This gives the row whose elements are all >0
>
> I can't seem to get indices of rows containing one or more elements >0
>
>        [[alternative HTML version deleted]]
>
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?