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Hands-On Python Natural Language Processing

You're reading from   Hands-On Python Natural Language Processing Explore tools and techniques to analyze and process text with a view to building real-world NLP applications

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Product type Paperback
Published in Jun 2020
Publisher Packt
ISBN-13 9781838989590
Length 316 pages
Edition 1st Edition
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Authors (2):
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Mayank Rasu Mayank Rasu
Author Profile Icon Mayank Rasu
Mayank Rasu
Aman Kedia Aman Kedia
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Aman Kedia
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Table of Contents (16) Chapters Close

Preface 1. Section 1: Introduction
2. Understanding the Basics of NLP FREE CHAPTER 3. NLP Using Python 4. Section 2: Natural Language Representation and Mathematics
5. Building Your NLP Vocabulary 6. Transforming Text into Data Structures 7. Word Embeddings and Distance Measurements for Text 8. Exploring Sentence-, Document-, and Character-Level Embeddings 9. Section 3: NLP and Learning
10. Identifying Patterns in Text Using Machine Learning 11. From Human Neurons to Artificial Neurons for Understanding Text 12. Applying Convolutions to Text 13. Capturing Temporal Relationships in Text 14. State of the Art in NLP 15. Other Books You May Enjoy

The Naive Bayes algorithm

In this section, we will delve into the Naive Bayes algorithm and build a sentiment analyzer. Naive Bayes is a popular ML algorithm based on the Bayes' theorem. The Bayes' theorem can be represented as follows:

Here, A, B are events:

  • P(A|B) is the probability of A given B, while P(B|A) is the probability of B given A.
  • P(A) is the independent probability of A, while P(B) is the independent probability of B.

Let's say we have the following fictitious dataset containing information about applications to Ivy League schools. The independent variables in the dataset are the applicant's SAT score, applicant's GPA, and information regarding whether the applicant's parents are alumni to an Ivy League school. The dependent variable is the outcome of the application. Based on this data, we are interested in calculating the likelihood of an applicant getting admission to an Ivy League school given that their SAT score is greater than 1...

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