Ben's approach using Sparse has a useful side:
t
1 0 0 1 0 1
0 1 0 0 1 0
1 1 1 0 1 1
1 1 0 1 1 1
ix1 =: 4$.$.
NB. list indices only where there is a 1. Binary array input
ix1 t
0 0
0 3
0 5
1 1
1 4
2 0
2 1
2 2
2 4
2 5
3 0
3 1
3 3
3 4
3 5
Skip Cave
On Wed, Jan 11, 2017 at 9:44 AM, Raul Miller <[email protected]> wrote:
> Easy to fix, though:
>
> 4$.$. 1+i.3 4
>
> --
> Raul
>
>
> On Wed, Jan 11, 2017 at 7:06 AM, Ben Gorte - CITG
> <[email protected]> wrote:
> >
> >> Ben:
> >> 4$.$. i.3 4 NB. Unboxed using Sparse
> >
> > Btw, this produces indices for the non-zero elements of the array only,
> which is not according to your specs.
> > Sorry for that.
> >
> >
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