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

Normal equations as an alternative for solving Linear Regression in Spark 2.0


In this recipe, we present an alternative to Gradient Descent (GD) and LBFGS by using Normal Equations to solve linear regression. In the case of normal equations, you are setting up your regression as a matrix of features and vector of labels (dependent variables) while trying to solve it by using matrix such as inverse, transpose, and so on.

The emphasis here is to highlight Spark's facility for using Equations to solve Linear Regression and not the details of the model or generated coefficients.

How to do it...

  1. We use the same housing dataset which we extensively covered in Chapter 5, Practical Machine Learning with Regression and Classification in Spark 2.0 - Part I and Chapter 6, Practical Machine Learning with Regression and Classification in Spark 2.0 - Part II, which relate various attributes (for example number of rooms, and so on) to the price of the house.

The data is available as housing8.csv under the...