Comments (1)
Hi @lrq1999,
You're mostly right. The edge_index[0] represents the source, and the edge_index[1] represents the target. In the default setting of message passing used in PyG, the message is passed from the source node to the target node; the source node denotes neighbors (with index j), and the target node denotes the ego (with index i). Here we're passing messages from neighbors to the ego. Feel free to ask me if you have further questions.
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