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Java Data Analysis

Java Data Analysis

By : John R. Hubbard
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Java Data Analysis

Java Data Analysis

By: John R. Hubbard

Overview of this book

Data analysis is a process of inspecting, cleansing, transforming, and modeling data with the aim of discovering useful information. Java is one of the most popular languages to perform your data analysis tasks. This book will help you learn the tools and techniques in Java to conduct data analysis without any hassle. After getting a quick overview of what data science is and the steps involved in the process, you’ll learn the statistical data analysis techniques and implement them using the popular Java APIs and libraries. Through practical examples, you will also learn the machine learning concepts such as classification and regression. In the process, you’ll familiarize yourself with tools such as Rapidminer and WEKA and see how these Java-based tools can be used effectively for analysis. You will also learn how to analyze text and other types of multimedia. Learn to work with relational, NoSQL, and time-series data. This book will also show you how you can utilize different Java-based libraries to create insightful and easy to understand plots and graphs. By the end of this book, you will have a solid understanding of the various data analysis techniques, and how to implement them using Java.
Table of Contents (14 chapters)
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13
Index

The relation data model

A relational database (RDB) is a database that stores its data in tables that are related by certain structural constraints. The word relational comes from the mathematical concept of a relation, which is essentially the same thing as a table. The precise definition follows.

A domain is a set of data values of the same data type, usually integer, decimal number, or text, but could be Boolean (True/False), nominal, or URL, among others. If D1, D2 ,…, Dn are domains, then their Cartesian product is the set D1, D2,…, Dn of all n-component sequences t = (d1, d2 ,…, dn ), where each di Di. Such sequences are called tuples (as in octuples when n = 8). A tuple is like a vector, except that the components of a tuple may be of different types; the components of a vector are usually just numbers. A relation is a subset of a Cartesian product of domains; that is, a set of tuples all from the same domain sequence (D1, D2 ,…, Dn), which...

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