improve add_edges for graph and heterographs

CarloLucibello / GraphNeuralNetworks.jl

Graph Neural Networks in Julia

MIT License

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Closed CarloLucibello closed 10 months ago

CarloLucibello commented 10 months ago

Support passing edge weights.
Allows to add edges with source or target indexes larger then num_nodes. New nodes are created in this case.
adds the empty graph constructor GNNGraph()

Fix #331.