Book Image

Java: Data Science Made Easy

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

Java: Data Science Made Easy

By: Richard M. Reese, Jennifer L. Reese, Alexey Grigorev

Overview of this book

Data science is concerned with extracting knowledge and insights from a wide variety of data sources to analyse patterns or predict future behaviour. It draws from a wide array of disciplines including statistics, computer science, mathematics, machine learning, and data mining. In this course, we cover the basic as well as advanced data science concepts and how they are implemented using the popular Java tools and libraries.The course starts with an introduction of data science, followed by the basic data science tasks of data collection, data cleaning, data analysis, and data visualization. This is followed by a discussion of statistical techniques and more advanced topics including machine learning, neural networks, and deep learning. You will examine the major categories of data analysis including text, visual, and audio data, followed by a discussion of resources that support parallel implementation. Throughout this course, the chapters will illustrate a challenging data science problem, and then go on to present a comprehensive, Java-based solution to tackle that problem. You will cover a wide range of topics – from classification and regression, to dimensionality reduction and clustering, deep learning and working with Big Data. Finally, you will see the different ways to deploy the model and evaluate it in production settings. By the end of this course, you will be up and running with various facets of data science using Java, in no time at all. This course contains premium content from two of our recently published popular titles: - Java for Data Science - Mastering Java for Data Science
Table of Contents (29 chapters)
Title Page
Credits
Preface
Free Chapter
1
Module 1
15
Module 2
26
Bibliography

Deeplearning4j architecture


In this section, we will discuss its architecture and address several of the common tasks performed when using the API. DLN typically starts with the creation of a MultiLayerConfiguration instance, which defines the network, or model. The network is composed of multiple layers. Hyperparameters are used to configure the network and are variables that affect such things as learning speed, activation functions to use for a layer, and how weights are to be initialized.

As with neural networks, the basic DLN process consists of:

  • Acquiring and manipulating data
  • Configuring and building a model
  • Training the model
  • Testing the model

We will investigate each of these tasks in the next sections.

Note

The code examples in this section are not intended to be entered and executed here. Instead, these examples are snippets out of later models that we will be using.

Acquiring and manipulating data

The DL4J API has a number of techniques for acquiring data. We will focus on those specific...