pgmpy.factors.factorset_product

pgmpy.factors.factorset_product(*factorsets_list)

Base method used for product of factor sets.

Suppose \(\vec\phi_1\) and \(\vec\phi_2\) are two factor sets then their product is another factors set \(\vec\phi_3 = \vec\phi_1 \cup \vec\phi_2\).

Parameters:

factorsets_list: FactorSet1, FactorSet2, …, FactorSetn

All the factor sets to be multiplied

Returns:

Product of factorset in factorsets_list

Examples

>>> from pgmpy.factors import FactorSet
>>> from pgmpy.factors.discrete import DiscreteFactor
>>> from pgmpy.factors import factorset_product
>>> phi1 = DiscreteFactor(
...     variables=["x1", "x2", "x3"], cardinality=[2, 3, 2], values=range(12)
... )
>>> phi2 = DiscreteFactor(
...     variables=["x3", "x4", "x1"], cardinality=[2, 2, 2], values=range(8)
... )
>>> factor_set1 = FactorSet(phi1, phi2)
>>> phi3 = DiscreteFactor(
...     variables=["x5", "x6", "x7"], cardinality=[2, 2, 2], values=range(8)
... )
>>> phi4 = DiscreteFactor(
...     variables=["x5", "x7", "x8"], cardinality=[2, 2, 2], values=range(8)
... )
>>> factor_set2 = FactorSet(phi3, phi4)
>>> factor_set3 = factorset_product(factor_set1, factor_set2)
>>> print(factor_set3)
set([<DiscreteFactor representing phi(x1:2, x2:3, x3:2) at 0x7fb3a1933e90>,
     <DiscreteFactor representing phi(x5:2, x7:2, x8:2) at 0x7fb3a1933f10>,
     <DiscreteFactor representing phi(x5:2, x6:2, x7:2) at 0x7fb3a1933f90>,
     <DiscreteFactor representing phi(x3:2, x4:2, x1:2) at 0x7fb3a1933e10>])