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meta-rl-algorithms

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A collection of Meta-Reinforcement Learning algorithms in PyTorch

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# Meta-Reinforcement Learning Algorithms
A PyTorch implementation of meta-reinforcement learning algorithms, RL^2 PPO, MGRL, and SNAIL.

## Setup
Install the packages using the `requirements.txt` file.

```bash
# using conda
conda create --name meta_rl python=3.10 --file requirements.txt
# Or pip
pip install requirements.txt
```

## Usage
Run experiments by using the following example command:

```bash
python main.py --name experiment_name -c configs/rl2_ppo.yml
```

## Algorithms

- [x] RL^2 Proximal Policy Optimization (PPO)
- [x] Meta-Gradient Reinforcement Learning (A2C)
    - Work in progress, last step is to fix the outer-loop gamma output.
- [ ] SNAIL

## References
- Achiam, J. (2018). Spinning Up in Deep Reinforcement Learning. https://spinningup.openai.com/en/latest/index.html
- Wang, J. X., Kurth-Nelson, Z., Tirumala, D., Soyer, H., Leibo, J. Z., Munos, R., Blundell, C., Kumaran, D., & Botvinick, M. (2017). Learning to reinforcement learn. ArXiv:1611.05763 [Cs, Stat]. http://arxiv.org/abs/1611.05763
- Duan, Y., Schulman, J., Chen, X., Bartlett, P. L., Sutskever, I., & Abbeel, P. (2016). RL$^2$: Fast Reinforcement Learning via Slow Reinforcement Learning (arXiv:1611.02779). arXiv. https://doi.org/10.48550/arXiv.1611.02779
- Zintgraf, L., Shiarlis, K., Igl, M., Schulze, S., Gal, Y., Hofmann, K., & Whiteson, S. (2020). VariBAD: A Very Good Method for Bayes-Adaptive Deep RL via Meta-Learning (arXiv:1910.08348). arXiv. https://doi.org/10.48550/arXiv.1910.08348
- Mishra, N., Rohaninejad, M., Chen, X., & Abbeel, P. (2018). A Simple Neural Attentive Meta-Learner (arXiv:1707.03141). arXiv. http://arxiv.org/abs/1707.03141
- Xu, Z., van Hasselt, H., & Silver, D. (2018). Meta-Gradient Reinforcement Learning. CoRR, abs/1805.09801. Retrieved from http://arxiv.org/abs/1805.09801

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