Hi Tim-
I see Craig has already responded.
It appears that the whichND docs need to
be updated---I am familiar with whichND()
and reading the help output was not
clear. :-( I guess this classifies as
a documentation bug.
Also, please don't post to both perldl and
pdl-porters. The purposes of the two lists
are different and, except for announcements,
appropriate discussions don't overlap.
I.e.,
from http://pdl.perl.org/?page=mailing-lists
The "PerlDL" list is the best place to ask general user questions.
It also features non-technical discussions about PDL, announcements,
etc.
and
The "PDL Porters" list is where developers work on the internals of
PDL. Discussions often get quite technical. Join this list if you'd
like to contribute to PDL.
Thanks,
Chris
On 8/4/2012 1:07 PM, 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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