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

Linear regression API with Lasso and L-BFGS in Spark 2.0


In this recipe, we will demonstrate the use of Spark 2.0's LinearRegression() API to showcase a unified/parameterized API to tackle the linear in a comprehensive capable of extension without backward-compatibility issues of an RDD-based named API. We show how to use the setSolver() to set the optimization method to first-order memory-efficient L-BFGS, which can deal with numerous amount of parameters (that is, especially in sparse configuration) with ease.

Note

In this recipe, the .setSolver() is set to lbgfs, which makes the L-BFGS (see RDD-based regression for more detail) the selected optimization method. The .setElasticNetParam() is not set, so the default of 0 remains in effect, which makes this a Lasso regression.

How to do it...

  1. We use a housing dataset from the UCI machine library depository.