Dataset Card for Pong-v4-expert-MCTS

Supported Tasks and Baseline

• This dataset supports the training for Procedure Cloning (PC ) algorithm.
• Baselines when sequence length for decision is 0:

  Train loss	Test Acc	Reward
  	0.90	20

• Baselines when sequence length for decision is 4:

  Train action loss	Train hidden state loss	Train acc (auto-regressive mode)	Reward
  			-21

Data Usage

Data description

This dataset includes 8 episodes of pong-v4 environment. The expert policy is EfficientZero, which is able to generate MCTS hidden states. Because of the contained hidden states for each observation, this dataset is suitable for Imitation Learning methods that learn from a sequence like PC.

Data Fields

• obs: An Array3D containing observations from 8 trajectories of an evaluated agent. The data type is uint8 and each value is in 0 to 255. The shape of this tensor is [96, 96, 3], that is, the channel dimension in the last dimension.
• actions: An integer containing actions from 8 trajectories of an evaluated agent. This value is from 0 to 5. Details about this environment can be viewed at Pong - Gym Documentation.
• hidden_state: An Array3D containing corresponding hidden states generated by EfficientZero, from 8 trajectories of an evaluated agent. The data type is float32.

This is an example for loading the data using iterator:

from safetensors import saveopen

def generate_examples(self, filepath):
    data = {}
    with safe_open(filepath, framework="pt", device="cpu") as f:
        for key in f.keys():
            data[key] = f.get_tensor(key)
        
    for idx in range(len(data['obs'])):
        yield idx, {
            'observation': data['obs'][idx],
            'action': data['actions'][idx],
            'hidden_state': data['hidden_state'][idx],
        }

Data Splits

There is only a training set for this dataset, as evaluation is undertaken by interacting with a simulator.

Initial Data Collection and Normalization

• This dataset is collected by EfficientZero policy.
• The standard for expert data is that each return of 8 episodes is over 20.
• No normalization is previously applied ( i.e. each value of observation is a uint8 scalar in [0, 255] )

Additional Information

Who are the source language producers?

@kxzxvbk

Social Impact of Dataset

• This dataset can be used for Imitation Learning, especially for algorithms that learn from a sequence.
• Very few dataset is open-sourced currently for MCTS based policy.
• This dataset can potentially promote the research for sequence based imitation learning algorithms.

Known Limitations

• This dataset is only used for academic research.
• For any commercial use or other cooperation, please contact: opendilab@pjlab.org.cn

License

This dataset is under Apache License 2.0.

Citation Information

@misc{Pong-v4-expert-MCTS,
    title={{Pong-v4-expert-MCTS: OpenDILab} A dataset for Procedure Cloning algorithm using Pong-v4.},
    author={Pong-v4-expert-MCTS Contributors},
    publisher = {huggingface},
    howpublished = {\url{https://huggingface.co/datasets/OpenDILabCommunity/Pong-v4-expert-MCTS}},
    year={2023},
}

Contributions

This data is partially based on the following repo, many thanks to their pioneering work:

• https://github.com/opendilab/DI-engine
• https://github.com/opendilab/LightZero

Please view the doc for anyone who want to contribute to this dataset.