Unexpected behavior sparse add

[KukumavMozolo]

When executing the following code:

x = torch.zeros((2,4))
y = torch.ones((1,4))
print(x+y)
#---> tensor([[1., 1., 1., 1.],
#        [1., 1., 1., 1.]])
x = SparseTensor.from_dense(x)
y = SparseTensor.from_dense(y)
res = add(x,y)
print(res.to_dense())
#--->tensor([[1., 1., 1., 1.],
#        [0., 0., 0., 0.]])

Is broadcasting not supported?

[rusty1s]

Broadcasting is indeed not supported. For addition, we currently just assume the output size is max(size_x, size_y).