trace_descendents(halo_type, fields=None, filename=None)¶
Trace the descendents of all halos.
A merger-tree for all halos will be created, starting with the first halo catalog and moving forward.
- halo_type : string
- The type of halo, typically “FOF” for FoF groups or “Subfind” for subhalos.
- fields : optional, list of strings
- List of additional fields to be saved to halo catalogs.
- filename : optional, string
- Directory in which merger-tree catalogs will be saved.