Book Image

Java for Data Science

By : Richard M. Reese, Jennifer L. Reese
Book Image

Java for Data Science

By: Richard M. Reese, Jennifer L. Reese

Overview of this book

para 1: Get the lowdown on Java and explore big data analytics with Java for Data Science. Packed with examples and data science principles, this book uncovers the techniques & Java tools supporting data science and machine learning. Para 2: The stability and power of Java combines with key data science concepts for effective exploration of data. By working with Java APIs and techniques, this data science book allows you to build applications and use analysis techniques centred on machine learning. Para 3: Java for Data Science gives you the understanding you need to examine the techniques and Java tools supporting big data analytics. These Java-based approaches allow you to tackle data mining and statistical analysis in detail. Deep learning and Java data mining are also featured, so you can explore and analyse data effectively, and build intelligent applications using machine learning. para 4: What?s Inside ? Understand data science principles with Java support ? Discover machine learning and deep learning essentials ? Explore data science problems with Java-based solutions
Table of Contents (19 chapters)
Java for Data Science
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Using map-reduce


Map-reduce is a model for processing large sets of data in a parallel, distributed manner. This model consists of a map method for filtering and sorting data, and a reduce method for summarizing data. The map-reduce framework is effective because it distributes the processing of a dataset across multiple servers, performing mapping and reduction simultaneously on smaller pieces of the data. Map-reduce provides significant performance improvements when implemented in a multi-threaded manner. In this section, we will demonstrate a technique using Apache's Hadoop implementation. In the Using Java 8 to perform map-reduce section, we will discuss techniques for performing map-reduce using Java 8 streams.

Hadoop is a software ecosystem providing support for parallel computing. Map-reduce jobs can be run on Hadoop servers, generally set up as clusters, to significantly improve processing speeds. Hadoop has trackers that run map-reduce operations on nodes within a Hadoop cluster...