Pytorch implementation for Neural-Grammar-Symbolic Learning with Back-Search (NGS-BS) on the Handwritten Formula Recognition task.

Closed Loop Neural-Symbolic Learning via Integrating Neural Perception, Grammar Parsing, and Symbolic Reasoning
Qing Li, Siyuan Huang, Yining Hong, Yixin Chen, Ying Nian Wu, and Song-Chun Zhu
In International Conference on Machine Learning (ICML) 2020.

@inproceedings{li2020ngs,
  title={Closed Loop Neural-Symbolic Learning via Integrating Neural Perception, Grammar Parsing, and Symbolic Reasoning},
  author={Li, Qing and Huang, Siyuan and Hong, Yining and Chen, Yixin and Wu, Ying Nian and Zhu, Song-Chun.},
  booktitle={International Conference on Machine Learning (ICML)},
  year={2020}
}

• Ubuntu 16.04
• Python 3.7
• NVIDIA TITAN RTX + CUDA 10.0
• PyTorch 1.4.0

1. Download the Handwritten Formula Recognition dataset from google drive and unzip it:

unzip HWF.zip

2. Create an environment with all packages from requirements.txt installed (Note: please double check the CUDA version on your machine and install pytorch accordingly):

conda create -y -n ngs python=3.7
source activate ngs
pip install -r requirements.txt

To reproduce the experiment results, we can simply run the following code:

sh run.sh

This script will train different model variants and save the training logs into the output directory. Since it will take a long time for the RL and MAPO baselines to converge, we put the final training logs in the results folder.

To plot the training curves, run:

jupyter notebook

Open the plot_results.ipynb and run all cells.