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

Summary


Naïve Bayes should come to mind when you are considering creating a model from a labeled dataset, for problems or application for which the features are conditionally independent. Its simplicity and robustness make Naïve Bayes one of the most widely applied supervised learning techniques.

This chapter illustrates the versatility of Naïve Bayes for text mining applications.

However, it should be noted that the requirement of feature independence cannot always be met. In the case of the classification of documents or news releases, Naïve Bayes incorrectly assumes that terms are semantically independent: the two entities age and date of birth are highly correlated. The discriminative classifiers described in the next few chapters address some of Naïve Bayes' limitations [5:14].

This chapter does not treat temporal dependencies, sequence of events, or conditional dependencies between observed and hidden features. These types of dependency necessitate a different approach to modeling, which...