Book Image

Expert Data Visualization

By : Jos Dirksen
Book Image

Expert Data Visualization

By: Jos Dirksen

Overview of this book

Do you want to make sense of your data? Do you want to create interactive charts, data trees, info-graphics, geospatial charts, and maps efficiently? This book is your ideal choice to master interactive data visualization with D3.js V4. The book includes a number of extensive examples that to help you hone your skills with data visualization. Throughout nine chapters these examples will help you acquire a clear practical understanding of the various techniques, tools and functionality provided by D3.js. You will first setup your D3.JS development environment and learn the basic patterns needed to visualize your data. After that you will learn techniques to optimize different processes such as working with selections; animating data transitions; creating graps and charts, integrating external resources (static as well as streaming); visualizing information on maps; working with colors and scales; utilizing the different D3.js APIs; and much more. The book will also guide you through creating custom graphs and visualizations, and show you how to go from the raw data to beautiful visualizations. The extensive examples will include working with complex and realtime data streams, such as seismic data, geospatial data, scientific data, and more. Towards the end of the book, you will learn to add more functionality on top of D3.js by using it with other external libraries and integrating it with Ecmascript 6 and Typescript
Table of Contents (10 chapters)

Voronoi Diagrams and Heatmaps

In this chapter, we're going to look at two final diagrams. We're going to explore what is possible with the Voronoi support provided by D3, and we're going to create a heatmap diagram. To explore these two subjects, we'll create the following visualizations:

  • We're going to start with a simple Voronoi diagram so we can better understand what a Voronoi is and what we can use it for.
  • Next, we're going to create a Voronoi diagram of all the airport locations in the world to explore the aesthetic aspects of Voronois.
  • We can also use Voronois to create very interesting-looking visualizations of random data. We'll use the approach we've seen in the previous two chapters to create a Voronoi fractal.
  • Finally, we're going to create a heatmap that visualizes the usage of swearwords in movies.

We start by exploring Voronois. Before we start, though...