Book Image

Apache Spark 2.x Machine Learning Cookbook

By : Mohammed Guller, Siamak Amirghodsi, Shuen Mei, Meenakshi Rajendran, Broderick Hall
Book Image

Apache Spark 2.x Machine Learning Cookbook

By: Mohammed Guller, Siamak Amirghodsi, Shuen Mei, Meenakshi Rajendran, Broderick Hall

Overview of this book

Machine learning aims to extract knowledge from data, relying on fundamental concepts in computer science, statistics, probability, and optimization. Learning about algorithms enables a wide range of applications, from everyday tasks such as product recommendations and spam filtering to cutting edge applications such as self-driving cars and personalized medicine. You will gain hands-on experience of applying these principles using Apache Spark, a resilient cluster computing system well suited for large-scale machine learning tasks. This book begins with a quick overview of setting up the necessary IDEs to facilitate the execution of code examples that will be covered in various chapters. It also highlights some key issues developers face while working with machine learning algorithms on the Spark platform. We progress by uncovering the various Spark APIs and the implementation of ML algorithms with developing classification systems, recommendation engines, text analytics, clustering, and learning systems. Toward the final chapters, we’ll focus on building high-end applications and explain various unsupervised methodologies and challenges to tackle when implementing with big data ML systems.
Table of Contents (20 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Introduction


Linear algebra is the cornerstone of machine learning (ML) and mathematicalprogramming (MP). When dealing with Spark's machine library, one must understand that the Vector/Matrix structures by Scala (imported by default) are different from the Spark ML, MLlib Vector, Matrix facilities provided by Spark. The latter, powered by RDDs, is the desired data structure if you are going to use Spark (that is, parallelism) out of the box for large-scale matrix/vector computation (for example, SVD implementation alternatives with more numerical accuracy, desired in some cases for derivatives pricing and risk analytics). The Scala Vector/Matrix libraries provide a rich set of linear algebra operations such as dot product, additions, and so on, that still have their own place in an ML pipeline. In summary, the key difference between using Scala Breeze and Spark or Spark ML is that the Spark facility is backed by RDDs which allows for simultaneous distributed, concurrent computing, and resiliency...