Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Frank Kane's Taming Big Data with Apache Spark and Python

You're reading from   Frank Kane's Taming Big Data with Apache Spark and Python Real-world examples to help you analyze large datasets with Apache Spark

Arrow left icon
Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781787287945
Length 296 pages
Edition 1st Edition
Languages
Concepts
Arrow right icon
Author (1):
Arrow left icon
Frank Kane Frank Kane
Author Profile Icon Frank Kane
Frank Kane
Arrow right icon
View More author details
Toc

Table of Contents (8) Chapters Close

Preface 1. Getting Started with Spark FREE CHAPTER 2. Spark Basics and Spark Examples 3. Advanced Examples of Spark Programs 4. Running Spark on a Cluster 5. SparkSQL, DataFrames, and DataSets 6. Other Spark Technologies and Libraries 7. Where to Go From Here? – Learning More About Spark and Data Science

Creating similar movies from one million ratings – part 3


About 15 minutes after I set off our movie-similarities-1m script on a cluster using EMR, I have some actual results to look at. Let's review what happened.

Assessing the results

Here are the results:

The top similar movie to Star Wars Episode Four, was Star Wars Episode Five, not too surprising. But the next entry is a little bit surprising, some little movie called Sanjuro had a very high similarity score. Let's look at what's going on there. Its actual strength, the number of people that rated that together with Star Wars, was only 60, so I think it's safe to say that is kind of a spurious result. Now that we're using a million ratings, we probably need to increase that minimum threshold on the number of co-raters in order to actually display a result. By doing so, we could probably pretty easily filter out movies like that and instead get Raiders of the Lost Ark as our second result instead of as our third. I think the position...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image