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Inverse Reinforcement Learning from a Gradient-based Learner
Giorgia Ramponi · Gianluca Drappo · Marcello Restelli

Thu Dec 10 09:00 AM -- 11:00 AM (PST) @ Poster Session 5 #1386

Inverse Reinforcement Learning addresses the problem of inferring an expert's reward function from demonstrations. However, in many applications, we not only have access to the expert's near-optimal behaviour, but we also observe part of her learning process. In this paper, we propose a new algorithm for this setting, in which the goal is to recover the reward function being optimized by an agent, given a sequence of policies produced during learning. Our approach is based on the assumption that the observed agent is updating her policy parameters along the gradient direction. Then we extend our method to deal with the more realistic scenario where we only have access to a dataset of learning trajectories. For both settings, we provide theoretical insights into our algorithms' performance. Finally, we evaluate the approach in a simulated GridWorld environment and on the MuJoCo environments, comparing it with the state-of-the-art baseline.

Author Information

Giorgia Ramponi (Politecnico di Milano)
Gianluca Drappo (Politecnico di Milano)
Marcello Restelli (Politecnico di Milano)

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