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PPO

• Proximal Policy Optimization with Generalized Advantage Estimation (PPO2)

  CS & ML Basic 2023. 2. 14. 17:04

  PPO2 (Proximal Policy Optimization with Generalized Advantage Estimation) is an extension of PPO that combines the PPO algorithm with Generalized Advantage Estimation (GAE), which is a method for estimating the advantage function. The main difference between PPO and PPO2 is the way they estimate the advantage function. In PPO, the advantage function is estimated using a single-step estimate, whi..

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• Comparison of TRPO and PPO in Reinforcement Learning

  CS & ML Basic 2023. 2. 14. 16:33

  TRPO In TRPO, the policy update is performed by solving the following constrained optimization problem: maximize L(θ, θ_old) subject to KL(π_θ_old || π_θ)

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• Proximal Policy Optimization (PPO) Algorithm

  CS & ML Basic 2023. 2. 14. 16:02

  The objective of the Proximal Policy Optimization (PPO) algorithm is to train a policy function that can control an agent's behavior in a given environment, such that it maximizes the expected cumulative reward over time. More formally, we can define the objective of PPO as follows: $$J(\theta) = \mathbb{E}{\pi{\theta}}\left[\sum_{t=0}^{\infty}\gamma^{t}r_{t}\right]$$ where \(J(\theta)\) is the ..

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