Book Image

D3.js 4.x Data Visualization - Third Edition

By : Aendrew Rininsland, Swizec Teller
Book Image

D3.js 4.x Data Visualization - Third Edition

By: Aendrew Rininsland, Swizec Teller

Overview of this book

Want to get started with impressive interactive visualizations and implement them in your daily tasks? This book offers the perfect solution-D3.js. It has emerged as the most popular tool for data visualization. This book will teach you how to implement the features of the latest version of D3 while writing JavaScript using the newest tools and technique You will start by setting up the D3 environment and making your first basic bar chart. You will then build stunning SVG and Canvas-based data visualizations while writing testable, extensible code,as accurate and informative as it is visually stimulating. Step-by-step examples walk you through creating, integrating, and debugging different types of visualization and will have you building basic visualizations (such as bar, line, and scatter graphs) in no time. By the end of this book, you will have mastered the techniques necessary to successfully visualize data and will be ready to use D3 to transform any data into an engaging and sophisticated visualization.
Table of Contents (18 chapters)
Title Page
About the Authors
About the Author2
About the Reviewer
Customer Feedback
Shape Primitives of D3

Pack it up, pack it in, let me begin...

The pack layout produces charts similar to treemaps, but using round nodes. This is probably the best of the last three charts in this section for representing this hierarchy -- remember how we needed to use a ludicrous amount of padding in our treemap to make the parent nodes more visible? Since circle packing diagrams use more space, the parent nodes are more visible and that relationship is more pronounced.

Like before, comment out the other westerosChart.init() lines in main.js and add this:

westerosChart.init('partition', 'data/GoT-lineages-screentimes.json');

Next, add the following to chapter6/index.js:

westerosChart.pack = function Pack(_data) { 
  const data = getMajorHouses(_data); 

  const stratify = d3.stratify() 
    .parentId(d => d.fatherLabel) 
    .id(d => d.itemLabel); 

  const root = stratify(data) 
    .sum(d => d.screentime) 

  const houseColors = color.copy().domain(houseNames(root));