Book Image

Mastering Julia - Second Edition

By : Malcolm Sherrington
Book Image

Mastering Julia - Second Edition

By: Malcolm Sherrington

Overview of this book

Julia is a well-constructed programming language which was designed for fast execution speed by using just-in-time LLVM compilation techniques, thus eliminating the classic problem of performing analysis in one language and translating it for performance in a second. This book is a primer on Julia’s approach to a wide variety of topics such as scientific computing, statistics, machine learning, simulation, graphics, and distributed computing. Starting off with a refresher on installing and running Julia on different platforms, you’ll quickly get to grips with the core concepts and delve into a discussion on how to use Julia with various code editors and interactive development environments (IDEs). As you progress, you’ll see how data works through simple statistics and analytics and discover Julia's speed, its real strength, which makes it particularly useful in highly intensive computing tasks. You’ll also and observe how Julia can cooperate with external processes to enhance graphics and data visualization. Finally, you will explore metaprogramming and learn how it adds great power to the language and establish networking and distributed computing with Julia. By the end of this book, you’ll be confident in using Julia as part of your existing skill set.
Table of Contents (14 chapters)

Signal processing

Signal processing is the art of analyzing and manipulating signals arising in many fields of engineering. It deals with operations on or analysis of analog as well as digitized signals, representing time-varying or spatially varying physical quantities.

Julia has the functionality for processing signals built into the standard library along with a growing set of packages, and the speed of Julia makes it especially well suited to such analysis.

We can differentiate between 1D signals, such as audio signals, electrocardiogram (ECG) signals, variations in pressure and temperature, and so on, and 2D resulting in imagery from video and satellite data streams. In this section, I will mainly focus on the former, but the techniques carry over in a straightforward fashion to the 2D cases.

Frequency analysis

A signal is simply a measurable quantity that varies in time and/or space. The key insight of signal processing is that a signal in time can be represented...