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Mastering Spark for Data Science

You're reading from   Mastering Spark for Data Science Lightning fast and scalable data science solutions

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781785882142
Length 560 pages
Edition 1st Edition
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Authors (5):
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David George David George
Author Profile Icon David George
David George
Matthew Hallett Matthew Hallett
Author Profile Icon Matthew Hallett
Matthew Hallett
Antoine Amend Antoine Amend
Author Profile Icon Antoine Amend
Antoine Amend
Andrew Morgan Andrew Morgan
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Andrew Morgan
Albert Bifet Albert Bifet
Author Profile Icon Albert Bifet
Albert Bifet
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Toc

Table of Contents (15) Chapters Close

Preface 1. The Big Data Science Ecosystem 2. Data Acquisition FREE CHAPTER 3. Input Formats and Schema 4. Exploratory Data Analysis 5. Spark for Geographic Analysis 6. Scraping Link-Based External Data 7. Building Communities 8. Building a Recommendation System 9. News Dictionary and Real-Time Tagging System 10. Story De-duplication and Mutation 11. Anomaly Detection on Sentiment Analysis 12. TrendCalculus 13. Secure Data 14. Scalable Algorithms

Summary

In this chapter, we have introduced a method for analyzing trends with TrendCalculus. We have outlined the fact that despite analysis of trends being a very common use case, there are few tools to aid the data scientist in this cause apart from very general-purpose visualization software. We have guided the reader through the TrendCalculus algorithm, demonstrating how we implement an efficient and scalable realization of the theory in Spark. We have described the process of identifying the key output of the algorithm: trend reversals on a named scale. Having calculated reversals, we used D3.js to visualize time series data that has been summarized for one-week windows, and plotted trend reversals. The chapter continued with an explanation of how to overcome the main edge case: the zero values found during simple trend calculation. We have concluded with a brief outline of the algorithm characteristics and potential use cases, demonstrating how the method is elegant and can be easily...

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