[yt-users] issues with bbox filtering

[Cameron Hummels]

Desika,

Is it possible that the bounds that you're providing to yt are in absolute
units (not in comoving), and that in the different dataset, those bounds
are no longer valid (e.g. if it were an early dataset at higher z so the
volume is smaller in absolute coordinates)?  Just an idea.

Also, when you get this working, it might be a good notebook to include in
the cookbook of the documentation for how to explore an SPH dataset.

Cameron


On Mon, Jun 23, 2014 at 7:57 AM, Desika Narayanan <dnarayan at haverford.edu>
wrote:

> Hi All,
>
> I'm playing around with filtering out particles from an SPH data set using
> the bounding box.  I have a (somewhat lengthy but not complicated) notebook
> that highlights some of the capabilities (and an issue that I've found)
> here:
>
> http://nbviewer.ipython.org/gist/dnarayanan/517b736c9bb0cd72a6fa
>
> The notebook does 3 things:
>
> 1. It first loads a snapshot from a cosmological simulation, and does a
> projection plot.
>
> 2. It then sets a smaller bounding box, and attempts to zoom in on that
> region (centered on the max density).   This works great.
>
> 3. Perplexingly, though, when I try basically the exact same code (the
> section after the second image) but with a different snapshot in the same
> simulation, I get a particle out of bounds error.
>
> One relevant clue is that this error only comes when trying to access
> smoothed quantities (i.e. the snippets where I try to access [as an
> example] the SFR gives no problems).    Probably obvious, but this is the
> bleeding edge yt (most recent update).
>
> Any thoughts would definitely be welcome.
>
> thanks,
> desika
>
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>


-- 
Cameron Hummels
Postdoctoral Researcher
Steward Observatory
University of Arizona
http://chummels.org
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