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Role of the Advantage Function in Policy Updates
Consider the following formula used to update an agent's policy parameters, θ, based on a collection of experiences D:
In the context of this update rule, briefly explain the primary role of the term A(s_t, a_t) and how its sign (positive or negative) influences the adjustment of the policy πθ.
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Ch.4 Alignment - Foundations of Large Language Models
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An agent is learning a task using a policy update rule defined by the following equation, where
πθ(at|st)is the policy andA(st, at)is the advantage of taking actionatin statest:In a specific state
s, the agent takes an actionathat results in an advantage valueA(s, a) = -3.0. Based on this single experience, how will the update rule adjust the policyπθ?Diagnosing Policy Update Instability
A2C Actor Loss Function
Role of the Advantage Function in Policy Updates