Book Image

Scientific Computing with Scala

By : Vytautas Jancauskas
Book Image

Scientific Computing with Scala

By: Vytautas Jancauskas

Overview of this book

Scala is a statically typed, Java Virtual Machine (JVM)-based language with strong support for functional programming. There exist libraries for Scala that cover a range of common scientific computing tasks – from linear algebra and numerical algorithms to convenient and safe parallelization to powerful plotting facilities. Learning to use these to perform common scientific tasks will allow you to write programs that are both fast and easy to write and maintain. We will start by discussing the advantages of using Scala over other scientific computing platforms. You will discover Scala packages that provide the functionality you have come to expect when writing scientific software. We will explore using Scala's Breeze library for linear algebra, optimization, and signal processing. We will then proceed to the Saddle library for data analysis. If you have experience in R or with Python's popular pandas library you will learn how to translate those skills to Saddle. If you are new to data analysis, you will learn basic concepts of Saddle as well. Well will explore the numerical computing environment called ScalaLab. It comes bundled with a lot of scientific software readily available. We will use it for interactive computing, data analysis, and visualization. In the following chapters, we will explore using Scala's powerful parallel collections for safe and convenient parallel programming. Topics such as the Akka concurrency framework will be covered. Finally, you will learn about multivariate data visualization and how to produce professional-looking plots in Scala easily. After reading the book, you should have more than enough information on how to start using Scala as your scientific computing platform
Table of Contents (16 chapters)
Scientific Computing with Scala
About the Author
About the Reviewer

Plotting with Wisp

We now turn our attention to Wisp, which is a powerful plotting library that you can use from the Scala shell. You can, of course, also use it from your program. But the interface it provides is so minimal that using it from the console is very convenient. It will visualize plots using your default browser. It is very simple to use and is probably the fastest way to quickly visualize your data currently available in Scala. The Wisp website is given here:

To enable the use of Wisp in your project, add the following line to your build.sbt file:

libraryDependencies += "com.quantifind" %% "wisp" % "0.0.4"

After doing that, run the following command from the shell while in the project directory:

sbt console

This will put you in the Scala console with the Wisp libraries loaded and ready to go. Note that, since Wisp is a large library with a lot of dependencies, it may take a while to pull them all in. Now, we can simply type in instructions and...