causaldag.classes.dag.DAG.contracted_directed_clique_tree¶
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DAG.
contracted_directed_clique_tree
()[source]¶ Return the contracted directed clique tree associated with this DAG.
See the following for the definition of the contracted directed clique tree: Squires, Chandler, et al. “Active Structure Learning of Causal DAGs via Directed Clique Tree.” (2020)
Returns: The directed clique tree of this DAG. Return type: networkx.MultiDiGraph Examples
>>> import causaldag as cd >>> d = cd.DAG(arcs={(0, 1), (1, 2), (1, 3), (1, 4), (3, 2), (3, 4)}) >>> cdct = d.contracted_directed_clique_tree() >>> cdct.nodes NodeView((frozenset({frozenset({1, 2, 3}), frozenset({1, 3, 4})}), frozenset({frozenset({0, 1})}))) >>> cdct.edges OutEdgeView([(frozenset({frozenset({0, 1})}), frozenset({frozenset({1, 2, 3}), frozenset({1, 3, 4})}))])