Implements measures of tree similarity, including 
  information-based generalized Robinson-Foulds distances
  (Phylogenetic Information Distance, Clustering Information Distance,
  Matching Split Information Distance; Smith 2020)
  <doi:10.1093/bioinformatics/btaa614>; 
  Jaccard-Robinson-Foulds distances (Bocker et al. 2013)
  <doi:10.1007/978-3-642-40453-5_13>, 
  including the Nye et al. (2006) metric <doi:10.1093/bioinformatics/bti720>;
  the Matching Split Distance (Bogdanowicz & Giaro 2012)
  <doi:10.1109/TCBB.2011.48>;
  the Hierarchical Mutual Information (Perotti et al. 2015)
  <doi:10.1103/PhysRevE.92.062825>;
  Maximum Agreement Subtree distances;
  the Kendall-Colijn (2016) distance <doi:10.1093/molbev/msw124>, and the
  Nearest Neighbour Interchange (NNI) distance, approximated per Li et al. 
  (1996) <doi:10.1007/3-540-61332-3_168>.
  Includes tools for visualizing mappings of tree space (Smith 2022)
  <doi:10.1093/sysbio/syab100>,
  for identifying islands of trees (Silva and Wilkinson 2021)
  <doi:10.1093/sysbio/syab015>,
  for calculating the median of sets of trees,
  and for computing the information content of trees and splits.

Perform two types of analysis: 1) checking the
    goodness-of-fit of tree models to your single-cell gene expression
    data; and 2) deciding which tree best fits your data.

Creates interpretable decision tree visualizations with the
    data represented as a heatmap at the tree's leaf nodes.  'treeheatr'
    utilizes the customizable 'ggparty' package for drawing decision
    trees.

A treemap is a space-filling visualization of hierarchical
    structures. This package offers great flexibility to draw treemaps.

Provides 'ggplot2' geoms for drawing treemaps.

Implementation of unconditional Bernoulli Scan Statistic developed
             by Kulldorff et al. (2003) <doi:10.1111/1541-0420.00039> 
             for hierarchical tree structures. Tree-based Scan Statistics are an
             exploratory method to identify event clusters across the space of a 
             hierarchical tree.