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

Ridge regression with SGD optimization in Spark 2.0


In this recipe, we use admission data from the UCI Library Repository to build and then train a model to predict student admission using the RDD-based LogisticRegressionWithSGD() Apache Spark API set. We use a given set of features (GRE, GPA, and Rank) used during the admission to predict model weights using ridge regression. We demonstrate the input feature standardization in a recipe, but it should be noted that parameter standardization has an important effect on the results, especially in a ridge regression setting.

Spark's ridge regression API (LogisticRegressionWithSGD) is meant to deal with multicollinearity (the explanatory variable or features are correlated and the assumption of intendent and randomly distributed feature variables are somewhat flawed). Ridge is about shrinking (penalizing via L2 regularization or a quadratic function) some of the parameters, therefore reducing their effect and in turn reducing complexity. It...