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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
Author Profile Icon Sohom Ghosh
Sohom Ghosh
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Toc

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

Understanding Data for Sentiment Analysis

Sentiment analysis is a type of text classification. Sentiment analysis models are usually trained using supervised datasets. Supervised datasets are a kind of dataset that are labeled with the target variable – usually a column that specifies the sentiment value in the text. This is the value we want to predict in the unseen text.

Exercise 64: Loading Data for Sentiment Analysis

In this exercise, we will load data that could be used to train a sentiment analysis model. For this exercise, we will be using three datasets, namely Amazon, Yelp, and IMDB. Follow these steps to implement this exercise:

  1. Open a Jupyter notebook.
  2. Insert a new cell and add the following code to import the necessary libraries:
    import pandas as pd
    pd.set_option('display.max_colwidth', 200)

    This imports the pandas library. It also sets the display width to 200 characters so that more of the review text is displayed on the screen.

  3. ...
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