ytree 2.1.1

An extension of yt for working with merger-tree data.

# ytree

[](https://travis-ci.org/brittonsmith/ytree) [](http://ytree.readthedocs.io/en/latest/?badge=latest) [](https://badge.fury.io/py/ytree) [](https://zenodo.org/badge/latestdoi/98564214)

This is ytree, a [yt](https://github.com/yt-project/yt) extension for generating and working with merger-tree data. ytree supports:

• loading merger-tree data from the Amiga Halo Finder, Consistent-Trees, Rockstar, and LHaloTree formats

• creating merger trees from Gadget’s inline FOF/SUBFIND catalogs

• fast, on-demand loading of trees and fields

• symbolic units, derived fields, and alias fields

• saving trees to a universal format

## Installation

ytree can be installed with pip:

` pip install ytree `

To get the development version, clone this repository and install like this:

` git clone https://github.com/brittonsmith/ytree cd ytree pip install -e . `

## Getting Started

Below is a notebook that demonstrates how to use ytree with merger-tree data. For more information, see the full [ytree documenation](http://ytree.readthedocs.io).

• [Introduction](https://github.com/brittonsmith/ytree/blob/master/doc/source/notebooks/Intro_to_ytree.ipynb)

## Sample Data

Sampled data for all merger-tree formats supported by ytree is available on the [yt Hub](https://girder.hub.yt/) in the [ytree data](https://girder.hub.yt/#collection/59835a1ee2a67400016a2cda) collection.

## Contributing

ytree would be much better with your contribution! As an extension of [the yt Project](http://yt-project.org/), we follow the yt [guidelines for contributing](https://github.com/yt-project/yt#contributing).

## Resources

• The latest documentation can be found at http://ytree.readthedocs.io

• ytree is an extension of [the yt Project](http://yt-project.org/). The [yt-project community resources](https://github.com/yt-project/yt#resources) can be used for ytree-related communication.