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Natural Language Processing Fundamentals

You're reading from   Natural Language Processing Fundamentals Build intelligent applications that can interpret the human language to deliver impactful results

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Product type Paperback
Published in Mar 2019
Publisher
ISBN-13 9781789954043
Length 374 pages
Edition 1st Edition
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Authors (2):
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Dwight Gunning Dwight Gunning
Author Profile Icon Dwight Gunning
Dwight Gunning
Sohom Ghosh Sohom Ghosh
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Sohom Ghosh
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Table of Contents (10) Chapters Close

Preface 1. Introduction to Natural Language Processing FREE CHAPTER 2. Basic Feature Extraction Methods 3. Developing a Text classifier 4. Collecting Text Data from the Web 5. Topic Modeling 6. Text Summarization and Text Generation 7. Vector Representation 8. Sentiment Analysis Appendix

Cleaning Text Data

Most of the time, text data cannot be used as it is. This is because the presence of various unknown symbols or links makes it dirty or unfit for use. Data cleaning is the art of extracting meaningful portions from data by eliminating unnecessary details. Consider the sentence, He tweeted, 'Live coverage of General Elections available at this.tv/show/ge2019. _/\_ Please tune in :) '.

Various symbols, such as "_/\_" and ":)," are present in the sentence. They do not contribute much to its meaning. We need to remove such unwanted details. This is done not only to focus more on the actual content but also to reduce computations. To achieve this, methods such as tokenization and stemming are used. We will learn about them one by one in the upcoming sections.

Tokenization

Tokenization and word tokenizers were briefly described in Chapter 1, Introduction to Natural Language Processing. Tokenization is the process of splitting sentences...

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