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data.tree

An R package to manage hierarchical data and tree structures

Hierarchical data is ubiquitous in statistics and programming (XML, search trees, family trees, classification, file system, etc.). However, no general-use tree data structure is available in R. Where tabular data has data.frame, hierarchical data is often modeled in lists of lists or similar makeshifts. These structures are often difficult to manage. This is where the data.tree package steps in. It lets you build trees of hierarchical data for various uses: to print, to generate breakdowns, to integrate with html widgets, to rapid prototype search algorithms, to test out new classification ideas, and much more.

The package provides functionality to convert from and to various formats such as data.frames, list of lists, dendrograms, ape phylo, igraph, JSON, YAML, and more.

NOTE:

The latest from github dev branch may have some breaking changes compared to CRAN. See NEWS for details.

Conventions:

Coding Conventions: Google Style Guide, see https://google-styleguide.googlecode.com/svn/trunk/Rguide.xml

Versioning Conventions: SemanticVersioning. See http://semver.org/ for details

Branching Conventions: GitFlow. See https://www.atlassian.com/git/tutorials/comparing-workflows/gitflow-workflow

Pull Requests: Very welcome. Please branch from the dev branch if possible.

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Install

install.packages('data.tree')

Monthly Downloads

30,177

Version

0.3.2

License

GPL (>= 2)

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Repository

http://github.com/gluc/data.tree

Maintainer

Christoph Glur

Last Published

August 25th, 2025

Functions in data.tree (0.3.2)

Convert a data.tree structure to an igraph network

Aggregate child values of a Node, standalone or in traversal.

Test whether all node names are unique.

Convert a data.tree structure to a list-of-list structure

Convert an object to a data.tree data structure

as.dendrogram.Node

Convert a Node to a dendrogram

as.Node.dendrogram

Convert a dendrogram to a data.tree Node

as.Node.data.frame

Convert a data.frame to a data.tree structure

as.data.frame.Node

Convert a data.tree structure to a data.frame

Sample Data: A Simple Company with Departments

data.tree: Hierarchical Data Structures

Convert a Node to a phylo object from the ape package.

Clone a tree (creates a deep copy)

Cumulate values among siblings

averageBranchingFactor

Calculate the average number of branches each non-leaf has

CreateRegularTree

Create a tree for demo and testing

CreateRandomTree

Create a tree for demo and testing

Convert a phylo object from the ape package to a Node

Convert a nested list structure to a data.tree structure

Check if a Node is a leaf

DefaultPlotHeight

Calculates the height of a Node given the height of the root.

Find a node by name in the (sub-)tree

Determine the number a Node has after conversion to a phylo object

Check if a Node is not a leaf

FormatFixedDecimal

Format a Number as a Decimal

Executes a function on a set of nodes

Format a Number as a Percentage

Check if a Node is the root

Reverts the sort order of a Node's children.

Traverse a Tree and Assign Values

NODE_RESERVED_NAMES_CONST

Names that are reserved by the Node class.

Check if a Node is not a root

Create a data.tree Structure With Nodes

Print a Node in a human-readable fashion.

Sample Data: Data Used by the ID3 Vignette

Traverse a tree or a sub-tree

Sort children of a Node or an entire data.tree structure

Plot a graph, or get a graphviz dot representation of the tree

Write a data.tree structure to Newick notation

Find a Node by provided criteria.

Traverse a Tree and Collect Values

Set a formatter function on a specific node

Get an attribute from a Node.