pyfca
=====
https://github.com/pyfca/pyfca
Python Formal Concept Analysis (`FCA`_).
The purpose is to collect algoritms for FCA.
Algorithms
----------
So far:
lattice construction:
- AddIntent
implications basis:
- Koenig
lattice drawing:
- create lattice diagram and output in
- svg
- tkinter
Plan
----
- Create a basic lattice data structure:
- Merge existing sources available online.
Lattice construction:
- FCbO
- InClose2
- ...
Implications basis:
- Closure
- LinClosure
- Wild's Closure
- ...
.. _`FCA`: https://en.wikipedia.org/wiki/Formal_concept_analysis
Usage
-----
It can be used to create a concept lattice and to draw it either using tkinter() or svg().
.. code::
import pyfca
fca = pyfca.Lattice([{1,2},{2},{1,3}])
diagram = pyfca.LatticeDiagram(fca,4*297,4*210)
diagram.svg().saveas('tmp.svg')
import cairosvg
cairosvg.svg2png(url="file:///<path to tmp.svg>", write_to='tmp.png')
The ``AddIntent`` algorithm is from the paper:
AddIntent: A New Incremental Algorithm for Constructing Concept Lattices
The lattice drawing algorithm is from:
`Galicia <http://www.iro.umontreal.ca/~galicia/>`_
Implications
------------
This uses the python int as a bit field to store the FCA context.
See this `blog`_ for more.
.. _`blog`: http://rolandpuntaier.blogspot.com/2015/07/implications.html
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"description": "pyfca\n=====\n\nhttps://github.com/pyfca/pyfca\n\nPython Formal Concept Analysis (`FCA`_).\n\nThe purpose is to collect algoritms for FCA.\n\nAlgorithms\n----------\n\nSo far:\n\nlattice construction:\n\n- AddIntent\n\nimplications basis:\n\n- Koenig\n\nlattice drawing:\n\n- create lattice diagram and output in \n\n - svg\n - tkinter\n\nPlan\n----\n\n- Create a basic lattice data structure:\n\n- Merge existing sources available online.\n\n Lattice construction:\n\n - FCbO\n - InClose2\n - ...\n\n Implications basis:\n\n - Closure\n - LinClosure\n - Wild's Closure\n - ...\n\n\n.. _`FCA`: https://en.wikipedia.org/wiki/Formal_concept_analysis\n\n\n\nUsage\n-----\n\nIt can be used to create a concept lattice and to draw it either using tkinter() or svg().\n\n.. code::\n\n import pyfca\n fca = pyfca.Lattice([{1,2},{2},{1,3}])\n diagram = pyfca.LatticeDiagram(fca,4*297,4*210)\n diagram.svg().saveas('tmp.svg')\n import cairosvg\n cairosvg.svg2png(url=\"file:///<path to tmp.svg>\", write_to='tmp.png')\n\n\n\nThe ``AddIntent`` algorithm is from the paper:\n\n AddIntent: A New Incremental Algorithm for Constructing Concept Lattices\n\n\nThe lattice drawing algorithm is from:\n\n `Galicia <http://www.iro.umontreal.ca/~galicia/>`_\n \n \n\n\nImplications\n------------\n\nThis uses the python int as a bit field to store the FCA context.\n\nSee this `blog`_ for more.\n\n\n.. _`blog`: http://rolandpuntaier.blogspot.com/2015/07/implications.html\n",
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