Hi Stephen, I'm trying to do halo finding in a subregion of the box, but do the various halo finders know that the boundary conditions are no longer periodic? If periodic BC is on by default, is there a flag to switch off periodicity during the subregion halo find? From G.S.
Hi Geoffrey,
Hi Stephen, I'm trying to do halo finding in a subregion of the box, but do the various halo finders know that the boundary conditions are no longer periodic? If periodic BC is on by default, is there a flag to switch off periodicity during the subregion halo find?
I think that this question is ill-posed in the sense that I'm not sure that anything good will happen if you try halo-finding in a region that touches one of the periodic box edges. The subregion halo finding is a kludge that is primarily meant for looking at stuff only where you're interested, say in the center of your nested-grid simulation, far away from the boundaries. To answer your specific question as best I can: No, there is nothing to turn off the periodic boundaries with subregion finding. But I think you shouldn't be doing subregion finding where the boundaries are a concern. I think Bad Things (tm) will happen. Let me know if that doesn't help! -- Stephen Skory s@skory.us http://stephenskory.com/ 510.621.3687 (google voice)
I was trying to see if I can analyze a big simulation by using it as a big
statistical sample, it was just a test of a backup plan B.
Plan A is of course analyze the big sim with many cores and lots of memory,
so hopefully plan A works.
From
G.S.
On Wed, Sep 21, 2011 at 3:04 PM, Stephen Skory wrote:
Hi Geoffrey,
Hi Stephen, I'm trying to do halo finding in a subregion of the box, but do the various halo finders know that the boundary conditions are no longer periodic? If periodic BC is on by default, is there a flag to switch off periodicity during the subregion halo find?
I think that this question is ill-posed in the sense that I'm not sure that anything good will happen if you try halo-finding in a region that touches one of the periodic box edges. The subregion halo finding is a kludge that is primarily meant for looking at stuff only where you're interested, say in the center of your nested-grid simulation, far away from the boundaries.
To answer your specific question as best I can: No, there is nothing to turn off the periodic boundaries with subregion finding. But I think you shouldn't be doing subregion finding where the boundaries are a concern. I think Bad Things (tm) will happen.
Let me know if that doesn't help!
-- Stephen Skory s@skory.us http://stephenskory.com/ 510.621.3687 (google voice) _______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
participants (2)
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Geoffrey So
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Stephen Skory