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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
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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

Formatting data using tokenization

The first step we will take to begin analyzing text is loading text files and then tokenizing our data by transforming the text from sentences into smaller pieces, such as words or terms. A text object can be tokenized in a number of ways. In this chapter, we will tokenize text into words, although other sized terms could also be tokenized. These are referred to as n-grams, so we can get two-word terms (2-grams), three-word terms, or a term of any arbitrary size.

To get started with the process of creating one-word tokens from our text objects, we will use the following steps:

  1. Let's load the libraries that we will need. For this project, we will use tidyverse for data manipulation, tidytext for special functions to manipulate text data, spacyr for extracting text metadata, and textmineR for word embeddings. To load these libraries, we run...
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