Pros and Cons of Actor-Critic Method

DQN

DDPG

Role of the Critic in Advantage Function Calculation

Robotic Chef Learning Paradigm

An autonomous agent is at a specific position in a grid world and must choose one of four directions to move (up, down, left, right). A purely value-based agent would estimate the long-term value of moving in each of the four directions and deterministically choose the direction with the highest estimated value. How does the decision-making process of an agent using an actor-critic method fundamentally differ in this same situation?

Definition of the Advantage Function

Training of Reward Models

In a reinforcement learning framework that separates the decision-making process from the evaluation process, there are two key components. Match each component to its primary function and the nature of its output.

Advantage Actor-Critic (A2C) Method