reproduce case study of HGCN

[shanzhong2021]

Thanks for this beautiful work.
Sorry I'm new to torch. I'm not sure if this is how you modified HGCN to incorporate Frechet mean, note line 72(unchanged) and 78(changed):

But this comes with errors. Could you tell me how exactly you did?
Thanks!

[louaaron]

I've added a frechet aggregation function for graphs. You have to reshape it in a specific way.