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Changelog

[0.1.4.2] - 2022-06-01

Elaborate Pattern Structures. Rewrite Sofia algorithm to mine hundreds of most stable concepts on big data. Add IntervalPS and SetPS to basic pattern structures.

[0.1.4.1] - 2022-12-03

OSDA toolkit edition. This version introduces monotonic concepts that are (among all) relevant for Ordered Sets in Data Analysis course in HSE University

Changed

  • Add monotonic concepts support: a.k.a. "disjunctive" formal concepts*;
  • Start refactoring BinTables: a class to work efficiently with tables of binary values.

* A disjunctive formal concept (A, B) is a pair of objects A and attributes B. The sets are s.t. each attribute from B describes at least one of the objects from A. And A is the maximal set of objects corresponding to specific B.

[0.1.4] - 2022-07-04

Pretty and easier-to-use visualizations via NetworkX.

Added

Rewrite visualizer submodule to make visualizations more versatile and easy to use.

  • Add LineVizNx: a class to visualize POSets and Concept Lattices via NetworkX
  • Add Mover: a class to simplify the positioning of nodes in a visualization
  • Add many NetworkX-like parameters to AbstractLineViz to form an interface for future visualization extensions

Disclaimer: The release was in production for too much time. So something may not work properly (although it should). I will try to publish the following releases more often.

[0.1.3] - 2021-09-09

Added

Partially ordered set

  • Add POSet subpackage to clean up the code of ConceptLattice class;
  • And add POSet visualization.

Concept lattice

  • Add Lindig algorithm to construct a concept lattice. Thanks to @MetaPostRocker;
  • And add ConceptLattice.read_json/write_json functions.

Visualization

  • Add FCART-like Hasse diagram layout. Thanks to @MetaPostRocker;
  • And add a function to count line intersections in Hasse diagram.

Many valued context

  • Add MVContext.read_json/write_json functions.

Changed

  • Move visualizer layouts to a specific python module;
  • Rename load_/save_ functions to read_/write_;
  • And split the repository into FCApy, FCApy_tutorials, FCApy_benchmarks, FCApy_papers.

Fixed

  • Drop build files from git;
  • Make FormalContext hash calculation stable among different python kernel runs;
  • And fix the levels of elements calculation in POSetVisualizer.

[0.1.2] - 2021-03-29

Optimize FormalContext with bitsets

Added

  • Add fcapy.context.bintable.BinTable class to encapsulate binary data processing

[0.1.1] - 2021-03-25

Concept Lattices, PatternStructures, Visualization and a bit of ML

Added

  • Write class implementations for ConceptLattice, Pattern Structures and Many Valued Context from FCA;
  • Add simple Concept Lattice visualization with networkx and plotly package;
  • and start developing tools to use ConceptLattice as a Supervised ML model.

[0.1.0] - 2020-12-04

Formal Context functionality

Added

  • Create FormalContext class,
  • Set up the pipelines for Travis CI/CD, Codecov,
  • and write basic documentation in readthedocs.org .