README.md

dmu-project

Repository for my Spring 2023 Decision Making Under Uncertainty final project. I investigated the performance of a reinforcement learning agent trained using a policy gradient to play Atari Pong. You can read the final report here.

Agent Demo

Here is a demo of one of the trained agents (a53b7b) playing and winning against the computer.

pong-agent.mp4

Source Files

File	Description
model_helpers.py	Helper functions for saving and loading PyTorch models.
play.py	Fun script for playing games in the Atari gym.
pong_test.py	Test script that tests the trained Pong agent.
pong_train.py	Train script that trains Pong agent via policy gradient.
visualization_and_stats.ipynb	Notebook for help visualizing models, and computing various statistics.

Models

Models were trained with PyTorch using Reinforcement Learning and a policy gradient. They are stored in the models directory. Complete metrics were collected with Aim.

Agent	ID	Train Time	Win Rate	Total Fames	Reward-to-Go	Baseline Subtraction	Max Steps / Episode	Total Layers	Hidden Dim	Episodes	Gamma	Learning Rate
4	f0d3a1baf6a04e9380841bc5	109hrs	~62%	506,007,959	✅	✅	None	3	300	20000	0.99	0.0001
3	2b9c7df2eca04bb49e31404f	35hrs	~95%	367,556,707	✅	✅	5000	3	200	20000	0.99	0.0001
2	a53b7b3457f14f4e99172150	38hrs	~95%	335,928,545	✅	❌	5000	3	200	20000	0.99	0.0001
1	b60ba6f06be54de99c2f890f	12hrs 29min	~28%	79,861,221	✅	❌	1000	3	200	20000	0.99	0.0001

• Win rate calculated over the result of 100 games played. See pong_test.py for how this is computed.
• Agent 4 not included in final report since it took too long to train.

Create and Activate Environment

python3 -m venv env
source env/bin/activate

Install Dependencies

python -m pip install -r requirements.txt
pip install gym\[accept-rom-license\]

Run Model

python pong_test.py