ytree.frontends.ytree.arbor.YTreeArbor

class ytree.frontends.ytree.arbor.YTreeArbor(filename)[source]

Class for Arbors created from the save_arbor or save_tree functions.

Methods

`__init__`(filename)	Initialize an Arbor given an input file.
`add_alias_field`(alias, field[, units, force_add])	Add a field as an alias to another field.
`add_analysis_field`(name, units[, dtype, default])	Add an empty field to be filled by analysis operations.
`add_derived_field`(name, function[, units, ...])	Add a field that is a function of other fields.
`add_vector_field`(name[, vector_components])	Add vector fields for a set of x,y,z component fields.
`get_nodes_from_selection`(container)	Generate TreeNodes from a yt data container.
`get_yt_selection`([above, below, equal, ...])	Get a selection of halos meeting given criteria.
`is_grown`(tree_node)	Return True if a tree has been fully assembled, i.e., the hierarchy of ancestor tree nodes has been built.
`is_setup`(tree_node)	Return True if arrays of uids and descendent uids have been read in.
`query`(key)	If given a string, return an array of field values for the roots of all trees.
`reload_arbor`()	Reload the arbor and setup pre-existing derived fields.
`reset_node`(tree_node)	Reset all data structures for a single node.
`save_arbor`(**kwargs)	Save the arbor to a file.
`select_halos`(criteria[, trees, select_from, ...])	Select halos from the arbor based on a set of criteria given as a string.
`set_selector`(selector, args, *kwargs)	Sets the tree node selector to be used.

Attributes

`arr`	Create a unyt_array using the Arbor's unit system.
`box_size`	The simulation box size.
`container`	Helper function for creating `NodeContainer` objects.
`cosmology`	Cosmology calculator with self-consistent parameters and units.
`field_info`	A dictionary containing information for each available field.
`hubble_constant`	Value of the Hubble parameter.
`is_planted`	Determine if trees have been planted.
`omega_lambda`
`omega_matter`
`omega_radiation`
`quan`	Create a unyt_quantity using the Arbor's unit system.
`size`	Return total number of trees.
`unit_registry`	Unit system registry.
`ytds`	Load as a yt dataset.