Use whichND.
$location = whichND $a>30;
On Aug 4, 2012, at 11:07 AM, Tim Haines wrote:
> Hi, all.
>
> I am trying to find the 2D coordinates of particular values in a piddle. I
> came up with the following, but is there an easier (better?) way? I was
> thinking that whichND would do this directly without the call to ndcoords,
> but it always returns *all* of the coordinates- not just the ones that match
> the mask.
>
> use PDL;
> $a = sequence(10,5);
> $b = $a->ndcoords->mv(0,2)->whereND($a>30);
> print $a, join(',', $b->dims()), "\n", $b;
>
>
> Many thanks.
>
> - Tim
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