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Natural Language Processing and Computational Linguistics

You're reading from   Natural Language Processing and Computational Linguistics A practical guide to text analysis with Python, Gensim, spaCy, and Keras

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Product type Paperback
Published in Jun 2018
Publisher Packt
ISBN-13 9781788838535
Length 306 pages
Edition 1st Edition
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Author (1):
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Bhargav Srinivasa-Desikan Bhargav Srinivasa-Desikan
Author Profile Icon Bhargav Srinivasa-Desikan
Bhargav Srinivasa-Desikan
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Table of Contents (17) Chapters Close

Preface 1. What is Text Analysis? 2. Python Tips for Text Analysis FREE CHAPTER 3. spaCy's Language Models 4. Gensim – Vectorizing Text and Transformations and n-grams 5. POS-Tagging and Its Applications 6. NER-Tagging and Its Applications 7. Dependency Parsing 8. Topic Models 9. Advanced Topic Modeling 10. Clustering and Classifying Text 11. Similarity Queries and Summarization 12. Word2Vec, Doc2Vec, and Gensim 13. Deep Learning for Text 14. Keras and spaCy for Deep Learning 15. Sentiment Analysis and ChatBots 16. Other Books You May Enjoy

Starting clustering

Like every other text analysis algorithm we applied before, the most important step remains the preprocessing step — getting rid of our stop words and lemmatizing words.

Once we're done with this, the next step is to convert our document into a vector representation we are most comfortable with.

Since we're dealing with scikit-learn's implementations for clustering and classification, let us use scikit-learn for our preprocessing. We should also use this opportunity to decide which dataset we intend to use for our experiments. While there are lots of solid options, we will stick with the popular 20 Newsgroups [3] dataset. Since the dataset comes bundled with scikit-learn, loading it and using it becomes an easy task as well.

You can follow the Jupyter notebook [4] on clustering and classification for the full details; we will be using...

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