Book Image

Data Visualization with D3 4.x Cookbook - Second Edition

By : Nick Zhu
Book Image

Data Visualization with D3 4.x Cookbook - Second Edition

By: Nick Zhu

Overview of this book

Master D3.js and create amazing visualizations with the Data Visualization with D3 4.x Cookbook. Written by professional data engineer Nick Zhu, this D3.js cookbook features over 65 recipes. ? Solve real-world visualization problems using D3.js practical recipes ? Understand D3 fundamentals ? Includes illustrations, ready-to-go code samples and pre-built chart recipes
Table of Contents (21 chapters)
Data Visualization with D3 4.x Cookbook - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Binding functions as data


One of the benefits of D3's excellent support for functional-style JavaScript programming is that it allows functions to be treated as data as well. This particular feature can offer some very powerful capabilities under certain circumstances. This is a more advanced recipe. Don't worry about it if you are new to D3 and have some difficulty understanding it at first. Over time, this functional programming usage will become natural to you.

Getting ready

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

https://github.com/NickQiZhu/d3-cookbook-v2/blob/master/src/chapter3/function-as-data.html .

How to do it...

In this recipe, we will explore the possibility of binding functions as data to your visual elements. This capability is extremely powerful and flexible, if used correctly:

<div id="container"></div> 
 
<script type="text/javascript"> 
    var data = []; // <- A 
    var datum = function (x) { // <- B 
...