dgl.function.e_sub_u

dgl.function.e_sub_u(lhs_field, rhs_field, out)

内置消息函数，通过在e和u的特征之间执行元素减法来计算边上的消息 如果特征具有相同的形状；否则，它首先将特征广播到新形状并执行元素操作。

Broadcasting follows NumPy semantics. Please see https://docs.scipy.org/doc/numpy/user/basics.broadcasting.html for more details about the NumPy broadcasting semantics.

Parameters:

• lhs_field (str) – The feature field of e.

• rhs_field (str) – The feature field of u.

• out (str) – The output message field.

示例

>>> import dgl
>>> message_func = dgl.function.e_sub_u('h', 'h', 'm')