Book Image

Learn D3.js

By : Helder da Rocha
2 (1)
Book Image

Learn D3.js

2 (1)
By: Helder da Rocha

Overview of this book

This book is a practical hands-on introduction to D3 (Data-driven Documents): the most popular open-source JavaScript library for creating interactive web-based data visualizations. Based entirely on open web standards, D3 provides an integrated collection of tools for efficiently binding data to graphical elements. If you have basic knowledge of HTML, CSS and JavaScript you can use D3.js to create beautiful interactive web-based data visualizations. D3 is not a charting library. It doesn’t contain any pre-defined chart types, but can be used to create whatever visual representations of data you can imagine. The goal of this book is to introduce D3 and provide a learning path so that you obtain a solid understanding of its fundamental concepts, learn to use most of its modules and functions, and gain enough experience to create your own D3 visualizations. You will learn how to create bar, line, pie and scatter charts, trees, dendograms, treemaps, circle packs, chord/ribbon diagrams, sankey diagrams, animated network diagrams, and maps using different geographical projections. Fundamental concepts are explained in each chapter and then applied to a larger example in step-by-step tutorials, complete with full code, from hundreds of examples you can download and run. This book covers D3 version 5 and is based on ES2015 JavaScript.
Table of Contents (13 chapters)

Sankey diagrams

In a Sankey diagram, lines or arrows of variable widths represent quantities flowing from one stage (node) to another. The chart is a directed acyclic graph (DAG). After reaching a stage, a flow may split or join other flows that arrive from previous stages, but never return to a previously visited stage. In most Sankey charts nodes are placed on a vertical grid, uniformly spaced, while curves flow through them. Nodes are usually represented as rectangles or vertical lines and sometimes hidden, to reveal only the flows.

Charles J. Minard's dramatic representation of Napoleon's attempt to invade Russia in 1812, uses a Sankey chart to reveal the tragic the fate of the French soldiers while they marched from Kovno (present-day Kaunas, Lithuania) to Moscow and back. The nodes are placed on geographical locations and the chart is also linked to a line chart...