temporal_bipartite_graph_projection

temporal_bipartite_graph_projection(graph, delta, pivot_type)

Projects a temporal bipartite graph into an undirected temporal graph over the pivot node type. Let G be a bipartite graph with node types A and B. Given delta > 0, the projection graph G’ pivoting over type B nodes, will make a connection between nodes n1 and n2 (of type A) at time (t1 + t2)/2 if they respectively have an edge at time t1, t2 with the same node of type B in G, and |t2-t1| < delta.

Parameters:

• graph (GraphView) – A directed raphtory graph

• delta (int) – Time period

• pivot_type (str) – node type to pivot over. If a bipartite graph has types A and B, and B is the pivot type, the new graph will consist of type A nodes.

Returns:

Projected (unipartite) temporal graph.

Return type:

Graph