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Hands-On Artificial Intelligence for Beginners

You're reading from   Hands-On Artificial Intelligence for Beginners An introduction to AI concepts, algorithms, and their implementation

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781788991063
Length 362 pages
Edition 1st Edition
Languages
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Authors (2):
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David Dindi David Dindi
Author Profile Icon David Dindi
David Dindi
Patrick D. Smith Patrick D. Smith
Author Profile Icon Patrick D. Smith
Patrick D. Smith
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Table of Contents (15) Chapters Close

Preface 1. The History of AI 2. Machine Learning Basics FREE CHAPTER 3. Platforms and Other Essentials 4. Your First Artificial Neural Networks 5. Convolutional Neural Networks 6. Recurrent Neural Networks 7. Generative Models 8. Reinforcement Learning 9. Deep Learning for Intelligent Agents 10. Deep Learning for Game Playing 11. Deep Learning for Finance 12. Deep Learning for Robotics 13. Deploying and Maintaining AI Applications 14. Other Books You May Enjoy

Q–learning

Q-learning is a reinforcement learning method that utilizes the action value function, or Q function, to solve tasks. In this section, we'll talk about both traditional Q-learning as well as Deep Q-learning.

Standard Q-learning works off the core concept of the Q-table. You can think of the Q-table as a reference table; every row represents a state and every column represents an action. The values of the table are the expected future rewards that are received for a specific combination of actions and states. Procedurally, we do the following:

  1. Initialize the Q-table
  2. Choose an action
  3. Perform that action
  4. Measure the reward that was received
  5. Update the Q- value

Let's walk through each of these steps to better understand the algorithm. First, we initialize the Q-table as zeros, and it is subsequently updated throughout the Q-learning training process....

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