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Machine learning has finally come of age. With H2O software, you can perform machine learning and data analysis using a simple open source framework that’s easy to use, has a wide range of OS and language support, and scales for big data. This hands-on guide teaches you how to use H20 with only minimal math and theory behind the learning algorithms.
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Darren Cook
Practical Machine
Learning with
H2O
POWERFUL, SCALABLE
TECHNIQUES FOR AI
AND DEEP LEARNING
Darren Cook
Practical Machine Learning
with H2O
Powerful, Scalable Techniques
for Deep Learning and AI
Boston Farnham Sebastopol
Tokyo
Beijing Boston Farnham Sebastopol
Tokyo
Beijing
978-1-491-96460-6
[LSI]
Practical Machine Learning with H2O
by Darren Cook
Copyright © 2017 Darren Cook. All rights reserved.
Printed in the United States of America.
Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.
O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are
also available for most titles (http://oreilly.com/safari). For more information, contact our corporate/insti‐
tutional sales department: 800-998-9938 or corporate@oreilly.com.
Editor: Nicole Tache
Production Editor: Colleen Lobner
Copyeditor: Kim Cofer
Proofreader: Charles Roumeliotis
Indexer: WordCo Indexing Services, Inc.
Interior Designer: David Futato
Cover Designer: Karen Montgomery
Illustrator: Rebecca Demarest
December 2016:
First Edition
Revision History for the First Edition
2016-12-01: First Release
2017-01-06: Second Release
See http://oreilly.com/catalog/errata.csp?isbn=9781491964606 for release details.
The O’Reilly logo is a registered trademark of O’Reilly Media, Inc. Practical Machine Learning with H2O,
the cover image of a crayfish, and related trade dress are trademarks of O’Reilly Media, Inc.
While the publisher and the author have used good faith efforts to ensure that the information and
instructions contained in this work are accurate, the publisher and the author disclaim all responsibility
for errors or omissions, including without limitation responsibility for damages resulting from the use of
or reliance on this work. Use of the information and instructions contained in this work is at your own
risk. If any code samples or other technology this work contains or describes is subject to open source
licenses or the intellectual property rights of others, it is your responsibility to ensure that your use
thereof complies with such licenses and/or rights.
Table of Contents
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
1.
Installation and Quick-Start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Preparing to Install 1
Installing R 2
Installing Python 2
Privacy 3
Installing Java 3
Install H2O with R (CRAN) 3
Install H2O with Python (pip) 5
Our First Learning 7
Training and Predictions, with Python 11
Training and Predictions, with R 13
Performance Versus Predictions 15
On Being Unlucky 16
Flow 17
Data 17
Models 20
Predictions 20
Other Things in Flow 22
Summary 23
2.
Data Import, Data Export. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Memory Requirements 25
Preparing the Data 26
Getting Data into H2O 28
Load CSV Files 28
Load Other File Formats 30
iii
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