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View Code? Open in Web Editor NEWA PyTorch implementation of Implicit Q-Learning
License: MIT License
A PyTorch implementation of Implicit Q-Learning
License: MIT License
Thanks for your work. Could your code behave well in Antmaze environments?
In the function return_range, the end of trajectory is marked by either the terminal signal or the time steps equals to max_episode_steps. However, as the dataset is extracted from D4RL's qlearning_dataset function, the second condition (time steps equals to max_episode_steps) is not true for the dataset.
This is due to the qlearning_dataset function will threw away the last transition if a trajectory is ended by timeout. So a large part of the trajectories will only have max_episode_steps - 1 transitions in the returned dataset. Thus the episodic return calculated by function return_range will be shifted by one step reward. This probably will have a tiny effect on the max and min return.
Ref: Sepcifically, see the logic in this line from D4RL: https://github.com/Farama-Foundation/D4RL/blob/71a9549f2091accff93eeff68f1f3ab2c0e0a288/d4rl/__init__.py#L117
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