[R] find indices of nonzero elements
Ott Toomet
siim at obs.ee
Tue Oct 9 09:30:56 CEST 2001
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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