[yt-dev] gdf frontend and standards in tension?

j s oishi jsoishi at gmail.com
Thu Jan 30 07:15:36 PST 2014


Hi John,

Sure, but I guess my bigger question was: why does yt expect this to be a
2D array?

j


On Wed, Jan 29, 2014 at 8:08 PM, John ZuHone <jzuhone at gmail.com> wrote:

> I might be missing something, but can't we just reshape/transform the
> array from GDF into the format yt wants?
>
> John ZuHone
> Laboratory for High-Energy Astrophysics
> NASA/Goddard Space Flight Center
> 8800 Greenbelt Rd., Mail Code 662
> Greenbelt, MD 20771
> (w) 301-286-2531
> (m) 781-708-5004
> john.zuhone at nasa.gov
> jzuhone at gmail.com
>
> On Jan 29, 2014, at 5:22 PM, j s oishi <jsoishi at gmail.com> wrote:
>
> Hi all,
>
> I've adapted yt's gdf_writer.py into a standalone class called pygdf (
> https://bitbucket.org/jsoishi/pygdf). I've done this so that any python
> code can now save data in the gdf format.
>
> While doing this, I came across something in the yt gdf frontend that I'm
> not quite sure I understand. In the grid metadata, yt expects
> /grid_particle_count to be a 2-D array, but the gdf standard clearly states
> this should be a 1-D (int64, N) array, where N is the number of grids.
> Further complicating the issue is the fact that if I create a 1-D array for
> /grid_particle_count, the failure point in the following script
>
> from yt.mods import *
> pf = load("/tmp/blah.gdf")
>
> sp = SlicePlot(pf, 2, "Density")
>
> is actually in data_objects/grid_patch.py, not in the gdf frontend itself.
> The file /tmp/blah.gdf can be generated by running the test.py script in
> pygdf.
>
> The obvious workaround is to simply make /grid_particle_count a 2D array
> (this is especially so since I'm not actually using particles at the
> moment), but I'm not sure why this should be so. The total count of
> particles in N grids seems to be better fit in a 1-D array to me. However,
> I'd like to understand better what's going on. Any pointers or
> clarification would be very helpful.
>
> Also, any feedback on pygdf would be most welcome!
>
> thanks,
>
> j
>
> _______________________________________________
> yt-dev mailing list
> yt-dev at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
>
>
> _______________________________________________
> yt-dev mailing list
> yt-dev at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.spacepope.org/pipermail/yt-dev-spacepope.org/attachments/20140130/812297db/attachment.html>


More information about the yt-dev mailing list