The MakeWeighted command returns a graph with vertices and edges from G. If M is part of the input, then the edge weights are taken from it; otherwise edge weights are assumed to be 1. If G is undirected, then M is assumed to be a symmetric matrix.

For efficiency, use datatype=integer for wordsize integer weights and datatype=float[8] for numerical (decimal) edge weights.

To read or modify the edge weights of a weighted graph, use the GetEdgeWeight and SetEdgeWeight commands.