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Mastering Spark for Data Science

You're reading from  Mastering Spark for Data Science

Product type Book
Published in Mar 2017
Publisher Packt
ISBN-13 9781785882142
Pages 560 pages
Edition 1st Edition
Languages
Authors (4):
Andrew Morgan Andrew Morgan
Profile icon Andrew Morgan
Antoine Amend Antoine Amend
Profile icon Antoine Amend
Matthew Hallett Matthew Hallett
Profile icon Matthew Hallett
David George David George
Profile icon David George
View More author details

Table of Contents (22) Chapters

Mastering Spark for Data Science
Credits
Foreword
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. The Big Data Science Ecosystem 2. Data Acquisition 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

Different approaches


The end goal of a recommendation system is to suggest new items based on a user's historical usage and preferences. The basic idea is to use a ranking for any product that a customer has been interested in in the past. This ranking can be explicit (asking a user to rank a movie from 1 to 5) or implicit (how many times a user visited this page). Whether it is a product to buy, a song to listen to, or an article to read, data scientists usually address this issue from two different angles: collaborative filtering and content-based filtering.

Collaborative filtering

Using this approach, we leverage big data by collecting more information about the behavior of people. Although an individual is by definition unique, their shopping behavior is usually not, and some similarities can always be found with others. The recommended items will be targeted for a particular individual, but they will be derived by combining the user's behavior with that of similar users. This is the famous...

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