causaldag.classes.ancestral_graph.AncestralGraph.add_directed¶

AncestralGraph.add_directed(i: Hashable, j: Hashable)[source]¶

Add a directed edge from node i to node j.

Parameters:	i – source of directed edge. j – target of directed edge.

Examples

>>> import causaldag as cd
>>> g = cd.AncestralGraph()
>>> g.add_directed(1, 2)
>>> g.directed
{(1, 2)}