graph_distance_matrix(graph, /, parallel_threshold=300, null_value=0.0)#

Get the distance matrix for an undirected graph

This differs from functions like digraph_floyd_warshall_numpy in that the edge weight/data payload is not used and each edge is treated as a distance of 1.

This function is also multithreaded and will run in parallel if the number of nodes in the graph is above the value of parallel_threshold (it defaults to 300). If the function will be running in parallel the env var RAYON_NUM_THREADS can be used to adjust how many threads will be used.

  • graph (PyGraph) – The graph to get the distance matrix for

  • parallel_threshold (int) – The number of nodes to calculate the the distance matrix in parallel at. It defaults to 300, but this can be tuned

  • null_value (float) – An optional float that will treated as a null value. This element will be the default in the matrix and represents the absense of a path in the graph. By default this is 0.0.


The distance matrix

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