[Yt-dev] L7 HOP center_of_mass problem

[Matthew Turk]

Hi Stephen,

> With the new setup, I'm getting negative values for the center_of_mass() for some of the haloes in L7 running parallel HOP. It's a small fraction of the total. I am not getting this effect on smaller datasets for this reason.

Which new setup?  With the patch including hop_numpy.h applied?  And,
can you tell us what these negative values look like?

> Matt, can you think of anything you changed when you did the HaloFinding switchover that would affect this?

Not that I can think of.  I got the same results on the small
datasets; hop should be called in the same way.  Can you show us one
or two of the lines where you get the negative values?

-Matt