Book Image

Scala for Machine Learning, Second Edition - Second Edition

Book Image

Scala for Machine Learning, Second Edition - Second Edition

Overview of this book

The discovery of information through data clustering and classification is becoming a key differentiator for competitive organizations. Machine learning applications are everywhere, from self-driving cars, engineering design, logistics, manufacturing, and trading strategies, to detection of genetic anomalies. The book is your one stop guide that introduces you to the functional capabilities of the Scala programming language that are critical to the creation of machine learning algorithms such as dependency injection and implicits. You start by learning data preprocessing and filtering techniques. Following this, you'll move on to unsupervised learning techniques such as clustering and dimension reduction, followed by probabilistic graphical models such as Naïve Bayes, hidden Markov models and Monte Carlo inference. Further, it covers the discriminative algorithms such as linear, logistic regression with regularization, kernelization, support vector machines, neural networks, and deep learning. You’ll move on to evolutionary computing, multibandit algorithms, and reinforcement learning. Finally, the book includes a comprehensive overview of parallel computing in Scala and Akka followed by a description of Apache Spark and its ML library. With updated codes based on the latest version of Scala and comprehensive examples, this book will ensure that you have more than just a solid fundamental knowledge in machine learning with Scala.
Table of Contents (27 chapters)
Scala for Machine Learning Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface
Index

Apache Spark core


The RDD is the core data structure of the Apache Spark architecture. RDDs store and preserve data distributed and partitioned over multiple processors and servers so operations can be executed concurrently.

Data frames have been added, later on, to extend RDDs with SQL functionality. The original Apache Spark machine learning library, MLlib, uses RDDs that operate at a lower level (API). The more recent ML library allows data scientists to describe transformation and actions using SQL.

Note

Deprecation RDD-based API for MLlib

The RDD-based classes and methods in MLlib have moved to maintenance mode in Spark 2.0 and will be completely removed in Spark 3.0

Why Spark?

The introduction of the Hadoop ecosystem more than 10 years ago, opened the door to large-scale data processing and analytics. The Hadoop framework relies on a very effective distributed filesystem, HDFS, suitable for processing a large number of files containing sequential data. However, this reliance on the distributed...