Pointer networks

Use pointer network to compute the convex hull.

This is an unofficial implementation of the research paper: https://arxiv.org/abs/1506.03134

Training

• Create a dataset: python3 data.py
• Training: python3 run_training.py

Inference

• Run: python3 predict_convex_hull.py -c ckpts/hk_state_0099999.ckpt -d 256 -l 200 -s 42

Attention hidden subspace

• Checkout 01-pca-attention.ipynb for the details.

• Encoder attention hidden states are in a 2d plane which is a 1-to-1 mapping from the point space.

• Decoder attention hidden states go around a circle in the 2d hidden plane.