[yt-users] halo finding on a volume subset

[Matthew Turk]

Stephen,

This *was* possible.  Until Irina emailed, I was under the impression
it still was; I don't know why the functionality was removed.

I believe that changing the data_source check and construction should
make this possible, similarly to how the projection mechanism checks
if a source has been provided.  The only variables that are required
to be initialized in __init__ related to the data_source are padding
and _data_source; if _data_source is supplied (i.e., add on
data_source to the contructor) and "is not None" then it should simply
set padding to 0.0 and set self._data_source equal to the supplied
source.

-Matt

On Mon, Sep 20, 2010 at 8:40 AM, Stephen Skory <stephenskory at yahoo.com> wrote:
> Irina,
>
>
>
>> Is there a way to run the halo finder on part of the  simulation volume?
>> For example, I have a box 256 Mpc on a side but I only  want to find halos
>>inside a smaller box, say 20 Mpc on a side.
>
>
> Unfortunately, this is not currently possible in yt. However, it should be
> possible if the right modifications are done. Something along these lines is how
> HOP/FOF are parallelized, so it should be translateable to your problem. I am
> not making promises that I will do this, but that it is possible. I'll think
> about it.
>
> However, I wonder why you only want halos in a small region? Do you have a
> nested simulation? Does it seem like the halo finding is taking too long? Are
> you looking for substructure? Depending on the answers to these questions, the
> modifications discussed above may not be required.
>
>  _______________________________________________________
> sskory at physics.ucsd.edu o__ Stephen Skory
> http://physics.ucsd.edu/~sskory/ _.>/ _Graduate Student
> ________________________________(_)_\(_)_______________
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>