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You're reading from  Apache Mahout Essentials

Product typeBook
Published inJun 2015
Reading LevelIntermediate
Publisher
ISBN-139781783554997
Edition1st Edition
Languages
Java
Tools
Mahout
Concepts
Machine Learning
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Author (1)
Jayani Withanawasam
Jayani Withanawasam
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Jayani Withanawasam

Jayani Withanawasam is R&D engineer and a senior software engineer at Zaizi Asia, where she focuses on applying machine learning techniques to provide smart content management solutions. She is currently pursuing an MSc degree in artificial intelligence at the University of Moratuwa, Sri Lanka, and has completed her BE in software engineering (with first class honors) from the University of Westminster, UK. She has more than 6 years of industry experience, and she has worked in areas such as machine learning, natural language processing, and semantic web technologies during her tenure. She is passionate about working with semantic technologies and big data.
Read more about Jayani Withanawasam

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User-based recommenders

In user-based recommenders, similar users from a given neighborhood are identified and item recommendations are given based on what similar users already bought or viewed, which a particular user did not buy or view yet.

For example, as shown in the following figure, if Nimal likes the movies Interstellar (2014) and Lucy (2014) and Sunil also likes the same movies, and in addition, if Sunil likes The Matrix (1999) as well, then we can recommend The Matrix (1999) to Nimal, as the chances are that Nimal and Sunil are like-minded people.

A real-world example – movie recommendations

Let's explain this approach using a real-world example on a movie recommendation site, as shown in the following figure:

Users who watched the movies (items) rated them according to their preferences. The rating is a value between 1 (lowest) and 10 (highest).

The user, item, and preferences (ratings) information is given in the following table; you need to save this data as movies.csv in order...

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Apache Mahout Essentials
Published in: Jun 2015Publisher: ISBN-13: 9781783554997
© 2015 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Jayani Withanawasam

Jayani Withanawasam is R&D engineer and a senior software engineer at Zaizi Asia, where she focuses on applying machine learning techniques to provide smart content management solutions. She is currently pursuing an MSc degree in artificial intelligence at the University of Moratuwa, Sri Lanka, and has completed her BE in software engineering (with first class honors) from the University of Westminster, UK. She has more than 6 years of industry experience, and she has worked in areas such as machine learning, natural language processing, and semantic web technologies during her tenure. She is passionate about working with semantic technologies and big data.
Read more about Jayani Withanawasam

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