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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

Building a deep Q-learning model 

At this point, we have defined the environment and our agent, which will make running our model quite straightforward. Remember that to get set up for reinforcement learning using R, we used a technique from object-oriented programming, which is not used very often in a programming language such as R. We created a class that describes an object, but is itself not an object. To create an object from a class, we must instantiate it. We set our initial values and instantiate an object using our DQNAgent class by using the following code:

state_size = 2
action_size = 20
agent = DQNAgent(state_size, action_size)

After running this block of code, we will see an agent object in our environment. The agent has a class of Environment; however, if we click on it, we will see something similar to the following screenshot, which contains some...

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