Taxi flow embedding node ID is not sorted

[thekingofkings]

27

The function get_graph_embedding_features in graph_embedding.py assumes the generated embedding is sorted by region ID, which is not true.

[thekingofkings]

New setting:

1. Learn embedding with size 8 (4 from 1st order neighbor, another 4 from 2nd order neighbor).
2. Random walk length is 6

Result

Training MAE	Training MRE	Testing MAE	Testing MRE
710	0.5299	562	0.4193