ytree.tree_farm.ancestry_checker.common_ids

ytree.tree_farm.ancestry_checker.common_ids(descendent_ids, ancestor_ids, threshold=0.5)

Determine if at least a given fraction of ancestor’s member particles are in the descendent.

descendent_ids : list of ints

Member ids for first halo.

ancestor_ids : list of int

Member ids for second halo.

threshold : float, optional

Critical fraction of ancestor’s particles ending up in the descendent to be considered a true ancestor. Default: 0.5.

True or False