ValueError: need at least one array to concatenate

uber-research / LaneGCN

[ECCV2020 Oral] Learning Lane Graph Representations for Motion Forecasting

https://arxiv.org/abs/2007.13732

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ValueError: need at least one array to concatenate #29

Open titas0602 opened 2 years ago

titas0602 commented 2 years ago

Hi @chenyuntc, I'm wondering how the code handles cases where there are no lanes in the xy box. I'm getting the following error in data.py while pre-processing data:-

Screenshot from 2022-05-18 18-43-41

I believe this is because the length of lane_idcs is 0.