Book Image

Data Visualization with D3.js Cookbook

By : Nick Zhu
Book Image

Data Visualization with D3.js Cookbook

By: Nick Zhu

Overview of this book

D3.js is a JavaScript library designed to display digital data in dynamic graphical form. It helps you bring data to life using HTML, SVG, and CSS. D3 allows great control over the final visual result, and it is the hottest and most powerful web-based data visualization technology on the market today. "Data Visualization with D3.js Cookbook" is packed with practical recipes to help you learn every aspect of data visualization with D3. "Data Visualization with D3.js Cookbook" is designed to provide you with all the guidance you need to get to grips with data visualization with D3. With this book, you will create breathtaking data visualization with professional efficiency and precision with the help of practical recipes, illustrations, and code samples. "Data Visualization with D3.js Cookbook" starts off by touching upon data visualization and D3 basics before gradually taking you through a number of practical recipes covering a wide range of topics you need to know about D3. You will learn the fundamental concepts of data visualization, functional JavaScript, and D3 fundamentals including element selection, data binding, animation, and SVG generation. You will also learn how to leverage more advanced techniques such as custom interpolators, custom tweening, timers, the layout manager, force manipulation, and so on. This book also provides a number of pre-built chart recipes with ready-to-go sample code to help you bootstrap quickly.
Table of Contents (21 chapters)
Data Visualization with D3.js Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Using gravity and charge


In this recipe we will introduce you to the first two fundamental forces: gravity and charge. As we have mentioned before, one objective of force layout's design is to loosely simulate Newton's equation of motion with particles, and one major feature of this simulation is the force of charge. Additionally, force layout also implements pseudo gravity or more accurately a weak geometric constraint typically centered on the SVG that can be leveraged to keep your visualization from escaping the SVG canvas. In the following example we will learn how these two fundamental, and sometimes opposing forces, can be leveraged to generate various effects with a particle system.

Getting ready

Open your local copy of the following file in your web browser:

https://github.com/NickQiZhu/d3-cookbook/blob/master/src/chapter11/gravity-and-charge.html.

How to do it...

In the following example we will experiment with the force layout gravity and charge settings so you can better understand...