[R] find indices of nonzero elements

[Ott Toomet]

Hi,

use:

which( a>0, arr.ind=TRUE)

best wishes,

Ott



On Mon, 8 Oct 2001, David A Richmond wrote:

> Hi,
> 	Is there a function func(x) where x is an array such that it
> returns a list of the indices of all non-zero elements of the array?
>
> for example:
> a:
> 1 0 0
> 0 0 1
> 0 1 0
>
> func(a) returns two vectors r and c:
> r c
> 1 1
> 2 3
> 3 2
>
>
> daver

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