Major Features and Improvements

• An object-oriented API for interactive plotting of Mapper graphs has been added with the MapperInteractivePlotter (#586). This is intended to supersede plot_interactive_mapper graph as it allows for inspection of the current state of the objects change by interactivity. See also "Backwards-Incompatible Changes" below.
• Further citations have been added to the mathematical glossary (#564).

Bug Fixes

• A bug preventing EuclideanCechPersistence from working correctly on point clouds in more than 2 dimensions has been fixed (#588).
• A validation bug preventing VietorisRipsPersistence and WeightedRipsPersistence from accepting non-empty dictionaries as metric_params has been fixed (#590).
• A bug causing an exception to be raised when node_color_statistic was passed as a numpy array in plot_static_mapper_graph has been fixed (#576).

Backwards-Incompatible Changes

• A major change to the behaviour of the (static and interactive) Mapper plotting functions plot_static_mapper_graph and plot_interactive_mapper_graph was introduced in #584. The new MapperInteractivePlotter class (see "Major Features and Improvements" above) also follows this new API. The main changes are as follows:

  • color_by_columns_dropdown has been eliminated.
  • color_variable has been renamed to color_features (but cannot be an array).
  • An additional keyword argument color_data has been added to more clearly separate the input data to the Mapper pipeline from the data to be used for coloring.
  • node_color_statistic is now applied column by column -- previously it could end up being applied to 2d arrays as a whole.
  • The defaults for color-related arguments lead to index values instead of the mean of the data.

• The default for weight_params in WeightedRipsPersistence is now the empty dictionary, and None is no longer allowed (#595).

Thanks to our Contributors

This release contains contributions from many people:

Umberto Lupo, Wojciech Reise, Julian Burella Pérez, Sean Law, Anibal Medina-Mardones, and Lewis Tunstall

We are also grateful to all who filed issues or helped resolve them, asked and answered questions, and were part of inspiring discussions.