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You're reading from  PyTorch 1.x Reinforcement Learning Cookbook

Product typeBook
Published inOct 2019
Reading LevelIntermediate
PublisherPackt
ISBN-139781838551964
Edition1st Edition
Languages
Python
Tools
PyTorch
Concepts
Reinforcement Learning
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Author (1)
Yuxi (Hayden) Liu
Yuxi (Hayden) Liu
author image
Yuxi (Hayden) Liu

Yuxi (Hayden) Liu was a Machine Learning Software Engineer at Google. With a wealth of experience from his tenure as a machine learning scientist, he has applied his expertise across data-driven domains and applied his ML expertise in computational advertising, cybersecurity, and information retrieval. He is the author of a series of influential machine learning books and an education enthusiast. His debut book, also the first edition of Python Machine Learning by Example, ranked the #1 bestseller in Amazon and has been translated into many different languages.
Read more about Yuxi (Hayden) Liu

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Solving the Taxi problem with Q-learning

The Taxi problem (https://gym.openai.com/envs/Taxi-v2/) is another popular grid world problem. In a 5 * 5 grid, the agent acts as a taxi driver to pick up a passenger at one location and then drop the passenger off at their destination. Take a look at the following example:

Colored tiles have the following meanings:

  • Yellow: The starting position of the taxi. The starting location is random in each episode.
  • Blue: The position of the passenger. It is also randomly selected in each episode.
  • Purple: The destination of the passenger. Again, it is randomly selected in each episode.
  • Green: The position of the taxi with the passenger.

The four letters R, Y, B, and G indicate the only tiles that allow picking up and dropping off the passenger. One of them is the destination, and one is where the passenger is located.

The taxi can take the following...

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PyTorch 1.x Reinforcement Learning Cookbook
Published in: Oct 2019Publisher: PacktISBN-13: 9781838551964
© 2019 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Yuxi (Hayden) Liu

Yuxi (Hayden) Liu was a Machine Learning Software Engineer at Google. With a wealth of experience from his tenure as a machine learning scientist, he has applied his expertise across data-driven domains and applied his ML expertise in computational advertising, cybersecurity, and information retrieval. He is the author of a series of influential machine learning books and an education enthusiast. His debut book, also the first edition of Python Machine Learning by Example, ranked the #1 bestseller in Amazon and has been translated into many different languages.
Read more about Yuxi (Hayden) Liu

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