ytree.data_structures.arbor.Arbor.add_analysis_field

Arbor.add_analysis_field(name, units)

Add an empty field to be filled by analysis operations.

Parameters:

• name (string) – Field name.
• units (string) – Field units.

Examples

>>> import ytree
>>> a = ytree.load("tree_0_0_0.dat")
>>> a.add_analysis_field("robots", "Msun * kpc")
>>> # Set field for some halo.
>>> a[0]["tree"][7]["robots"] = 1979.816