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)

Simple streaming line

For our first example, we're going to create two simple streaming lines. The result we'll be aiming for is the following (which you can see by opening up the DVD3/src/chapter-06/D06-01.html example):

In this image, we have got two horizontal lines which move from the right of the screen to the left. Whenever you move your mouse, the distance traveled is stored and rendered as two lines. Each point in the graph represents the total distance traveled along the x-axis or the y-axis. The bottom of this graph is a simple axis which shows the current time, and which moves together with the line graph.

To accomplish this graph, we need to take the following steps:

  1. The first thing we need to do is define the various scales which we can use for rendering the scale at the bottom, and which we use to determine the x and y positions of each graph element.
  2. When we've got the scales, we...