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Hands-On Deep Learning with R

You're reading from   Hands-On Deep Learning with R A practical guide to designing, building, and improving neural network models using R

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Product type Paperback
Published in Apr 2020
Publisher Packt
ISBN-13 9781788996839
Length 330 pages
Edition 1st Edition
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Authors (2):
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Rodger Devine Rodger Devine
Author Profile Icon Rodger Devine
Rodger Devine
Michael Pawlus Michael Pawlus
Author Profile Icon Michael Pawlus
Michael Pawlus
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Table of Contents (16) Chapters Close

Preface 1. Section 1: Deep Learning Basics
2. Machine Learning Basics FREE CHAPTER 3. Setting Up R for Deep Learning 4. Artificial Neural Networks 5. Section 2: Deep Learning Applications
6. CNNs for Image Recognition 7. Multilayer Perceptron for Signal Detection 8. Neural Collaborative Filtering Using Embeddings 9. Deep Learning for Natural Language Processing 10. Long Short-Term Memory Networks for Stock Forecasting 11. Generative Adversarial Networks for Faces 12. Section 3: Reinforcement Learning
13. Reinforcement Learning for Gaming 14. Deep Q-Learning for Maze Solving 15. Other Books You May Enjoy

Tuning hyperparameters

We have now defined our environment and iterated over all possible actions and results from any given state to calculate the quality value of every move and stored these values in our Q object. At this point, we can now begin to tune the options for this model to see how it impacts performance.

If we recall, there are three parameters for reinforcement learning, and these are alpha, gamma, and epsilon. The following list describes the role of each parameter and the impact of adjusting their value:

  • Alpha: The alpha rate for reinforcement learning is the same as the learning rate for many other machine learning models. It is the constant value used to control how quickly probabilities are updated as calculations are made based on exploring rewards for the agent taking certain actions.
  • Gamma: Adjusting gamma adjusts how much the model values future rewards...
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