dgl.ops.copy_u_sum

dgl.ops.copy_u_sum(g, x)

Generalized SpMM function. It copies node feature to edge as the message. Then aggregates the message by sum on destination nodes.

Parameters

• g (DGLGraph) – The input graph

• x (tensor) – The source node features.

Returns

The result tensor.

Return type

tensor

Notes

This function supports autograd (computing input gradients given the output gradient).

The sum function will return zero for nodes with no incoming messages.