Hi Reju, It looks like you're trying to use the merger tree code from yt-2.x, which is no longer supported in yt-3. Instead, I recommend looking into the ytree code, which is a new merger tree code that is based on yt. More information is available here: http://ytree.readthedocs.io/en/latest/ If you have any questions about it, feel free to use this list. Britton On Tue, Oct 25, 2016 at 11:41 PM, Reju Sam John <rejusamjohn@gmail.com> wrote:

Dear all,

I would like to get few clarification on yt.analysis_modules.halo_ merger_tree.merger_tree.MergerTree()

1) MergerTree() has a parameter halo_finder_threshold. Does this something synonym to virial overdensity(like M200 or R200 ) ? 2) FOF_link_length parameter for halo_finder_function = FOFHaloFinder. The default value is 0.2. My doubt is, 0.2 is in which unit ? Is it in code unit or Mpc ?

And also halo_finder_function = HaloFinder and halo_finder_function = FOFHaloFinder are giving entirely different value for the Group Mass in the MergerHalo.out (a difference of more than one order of magnitude)

thank you.

-- Reju Sam John

_______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org