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Machine Learning with R
Second Edition
Discover how to build machine learning algorithms,
prepare data, and dig deep into data prediction
techniques with R
Brett Lantz
BIRMINGHAM - MUMBAI
Machine Learning with R
Second Edition
Copyright © 2015 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means, without the prior written
permission of the publisher, except in the case of brief quotations embedded in
critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy
of the information presented. However, the information contained in this book is
sold without warranty, either express or implied. Neither the author, nor Packt
Publishing, and its dealers and distributors will be held liable for any damages
caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the
companies and products mentioned in this book by the appropriate use of capitals.
However, Packt Publishing cannot guarantee the accuracy of this information.
First published: October 2013
Second edition: July 2015
Production reference: 1280715
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham B3 2PB, UK.
ISBN 978-1-78439-390-8
www.packtpub.com
Credits
Author
Brett Lantz
Reviewers
Vijayakumar Nattamai Jawaharlal
Kent S. Johnson
Mzabalazo Z. Ngwenya
Anuj Saxena
Commissioning Editor
Ashwin Nair
Acquisition Editor
James Jones
Content Development Editor
Natasha D'Souza
Technical Editor
Rahul C. Shah
Copy Editors
Akshata Lobo
Swati Priya
Indexer
Monica Ajmera Mehta
Production Coordinator
Arvindkumar Gupta
Cover Work
Arvindkumar Gupta
Project Coordinator
Vijay Kushlani
Proofreader
Safis Editing
About the Author
understand human behavior. A trained sociologist, he was first enchanted by
machine learning while studying a large database of teenagers' social networking
website profiles. Since then, Brett has worked on interdisciplinary studies of cellular
telephone calls, medical billing data, and philanthropic activity, among others. When
not spending time with family, following college sports, or being entertained by his
dachshunds, he maintains
http://dataspelunking.com/
, a website dedicated to
sharing knowledge about the search for insight in data.
This book could not have been written without the support of my
friends and family. In particular, my wife, Jessica, deserves many
thanks for her endless patience and encouragement. My son, Will,
who was born in the midst of the first edition and supplied
much-needed diversions while writing this edition, will be a big
brother shortly after this book is published. In spite of cautionary
tales about correlation and causation, it seems that every time I
expand my written library, my family likewise expands! I dedicate
this book to my children in the hope that one day they will be
inspired to tackle big challenges and follow their curiosity wherever
it may lead.
I am also indebted to many others who supported this book
indirectly. My interactions with educators, peers, and collaborators
at the University of Michigan, the University of Notre Dame, and the
University of Central Florida seeded many of the ideas I attempted
to express in the text; any lack of clarity in their expression is purely
mine. Additionally, without the work of the broader community
of researchers who shared their expertise in publications, lectures,
and source code, this book might not have existed at all. Finally,
I appreciate the efforts of the R team and all those who have
contributed to R packages, whose work has helped bring machine
learning to the masses. I sincerely hope that my work is likewise a
valuable piece in this mosaic.
Brett Lantz
has spent more than 10 years using innovative data methods to
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