causaldag.classes.dag.DAG.moral_graph

DAG.moral_graph()

Return the (undirected) moral graph of this DAG, i.e., the graph with the parents of all nodes made adjacent.

Returns:Moral graph of this DAG. Return type:UndirectedGraph

Examples

>>> import causaldag as cd
>>> d = cd.DAG(arcs={(1, 3), (2, 3)})
>>> ug = d.moral_graph()
>>> ug.edges
{frozenset({1, 3}), frozenset({2, 3}), frozenset({1, 2})}