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This is a module providing a set of commonly used algorithms in FCA, RCA, and some of its variants. Its general intention is to provide an easy to use API so that it's easier to create other programs using these algorithms. The main algorithm that calculates formal concepts is inclose
, and, in this version, it is implemented in C++. Considering this, the API is expected to behave somewhat acceptably.
fca_cli -c input.csv --show_hasse
The context is expected to be a csv
with the following format
name | attr1 | attr2 |
---|---|---|
obj1 | x | |
obj2 | x | |
obj3 | x | x |
obj4 |
fca_cli -c input.csv --show_hasse --output_dir path/to/folder/
Will create two files, one representing the hasse graph, the other one with a concept for each line. The line is the index in the hasse graph.
To plot the hasse diagrams of the contexts 1 and 2 after applying RCA with exists
fca_cli -k context_1.csv context_2.csv -r relation_1_2.csv relation_2_1.csv --show_hasse
to specify operator
fca_cli -k context_1.csv context_2.csv -r relation_1_2.csv relation_2_1.csv --show_hasse -o forall
Module for FCA basics such as retrieving concepts, drawing a hasse diagram, etc
from fca.api_models import Context, Concept
c = Context(O : List[str], A : List[str], I : List[List[int]])
concepts = c.get_concepts(c) List[Concept]
from fca.api_models import IncLattice
l = IncLattice(attributes=['a', 'b', 'c', 'd'])
l.add_intent('o1', [0, 2]) # numbers are the indices of the attributes
l.add_intent('o2', [1, 2])
.
.
.
from fca.api_models import IncLattice
l = IncLattice()
l.add_pair('o1', 'a')
l.add_pair('o2', 'b')
l.add_pair('o2', 'a')
.
.
.
from fca.api_models import Context
c = Context(O, A, I)
c.get_association_rules(min_support=0.4, min_confidence=1)
from fca.plot.plot import plot_from_hasse
from fca.api_models import Context
k = Context(O, A, I)
k.get_lattice().plot()
# plot receives a number of kwargs such as print_latex=True|False
l = IncLattice(attributes=['a', 'b', 'c', 'd'])
l.add_intent('o1', [0, 2]) # numbers are the indices of the attributes
l.add_intent('o2', [1, 2])
.
.
.
l.plot()
FAQs
FCA basic algorithms
We found that fca-algorithms demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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