使用D3.js创建交互式图形与数据驱动应用实战

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"D3.js in Action(Manning,2015)" 是一本由 Elijah Meeks 编著的实战教程，专注于教授如何利用 D3.js 创建交互式图形和数据驱动的应用程序。这本书深入解释了 D3.js 的内置布局，并通过多种可视化类型的实用案例进行演示。此外，书中还探讨了创建内容、动画以及动态数据表示的实际技术，包括交互式图形和网络直播数据的处理。在最后章节，作者展示了如何利用 D3.js 的丰富交互模型构建完整的Web应用，帮助读者将 D3.js 集成到他们的Web开发流程中，提升网站用户体验。 D3.js (Data-Driven Documents) 是一个JavaScript库，专为数据可视化而设计，它允许开发者结合SVG、HTML和CSS来操作数据，生成复杂的可交互的图表和可视化。本书主要涵盖了以下知识点： 1. **D3.js 基础**：介绍D3.js的核心概念，如选择集（Selections）、绑定数据（Data Binding）和数据操作（Data Join），这些是构建任何D3项目的基石。 2. **数据布局**：D3.js 提供了各种布局算法，如树形图、力导向图、柱状图和饼图等，这些布局可以帮助快速构建可视化。书中会详细讲解这些布局的用法和适用场景。 3. **数据可视化**：讲解如何根据不同的数据类型和需求选择合适的可视化方法，如条形图、折线图、散点图等，以及如何自定义样式和颜色以增强视觉效果。 4. **交互性**：D3.js 的强项在于其交互性，书中有专门章节讨论如何添加交互元素，如悬停提示、点击事件、缩放和平移等，使用户能够探索和理解数据。 5. **动态数据**：介绍如何处理实时或流式数据，构建动态更新的可视化，例如实时数据显示和数据流分析。 6. **动画效果**：讲解如何利用D3.js创建平滑的过渡和动画效果，增加视觉吸引力并引导用户注意力。 7. **Web集成**：探讨如何将D3.js与HTML、CSS和JavaScript其他库（如jQuery）结合，构建完整的Web应用程序。 8. **最佳实践和优化**：提供编写高效、可维护的D3.js代码的建议，以及如何优化性能和响应速度。通过阅读本书，读者不仅可以学习到D3.js的技术细节，还能掌握如何将这些技术应用于实际项目，从而提升网站和应用的互动性和用户体验。无论是数据科学家、前端开发者还是可视化设计师，都能从中受益。

ABOUT THIS BOOK

The next five chapters use

in the ways we typically think of. Chapter 4 teaches

you how to create simple graphics from data, such as line charts, axes, and boxplots.

Chapter 5 gives an in-depth exploration of various traditional data visualization lay-

outs like pie charts, tree layouts, and word clouds. Chapter 6 is devoted to network

visualization, which might seem exotic, but network visualization is being used more

and more in a variety of domains. Chapter 7 dives into the rich mapping capabilities

, and includes leveraging Topo

JSON

to do interesting geodata manipulation in

the browser. Chapter 8 is devoted to manipulating traditional

HTML

elements, like

paragraphs and lists, to demonstrate that

is not tied to

SVG

The last three chapters and chapter 12 (online only) cover topics that can be con-

sidered deep diving into

. I’ve found that each has become an important part of my

own practice. This includes principles for wiring up your own data dashboard, creat-

ing your own

layouts and components, optimizing data visualization for large data-

sets, and writing data visualization for mobile. Even if you don’t think you’ll ever be

using

in these ways, each of these chapters still touches on key aspects of using

How to use this book

If you’re just getting started with

, I suggest going through chapters 1 through 4 in

order. Each chapter builds on the last and establishes the basic principles not only of

but also of data visualization. After that, it depends on what you plan to use

for. If

your data is mostly geographic, then you can jump to chapter 7, and similarly, if your

data is mostly network data, you can jump to chapter 6. If you’re doing traditional data

visualization, then I suggest going to chapter 5 and then on to chapter 9 to start think-

ing about dashboards, which are a key component of traditional data visualization.

If you’ve been using

for a while and want to improve your skills, I suggest skim-

ming the first three chapters. The parts that I think might be of particular interest are

in chapter 3, and deal with color and loading external resources like

SVG

icons or

HTML

content. You might also want to review generators and components in chap-

ter 4 to fill in any gaps you might have dealing with these common, but often under-

examined, parts of

. After that, it depends on what you see as your strengths and

what you see as your goals for using

. If you want to maximize traditional data

visualization, take a look at chapter 5 to see the layouts, and then look at chapter 9

for dashboards. You’re probably familiar with most of the content there, but these

chapters deal with it more exhaustively than you likely have experienced. After that,

look at chapter 11 and see if there are any optimization techniques you might want

to bring into your data visualization, or look at chapter 8 and think about how you

might use the

tricks you know to build

elements and otherwise do traditional

web development.

Much of the value of this book comes in chapters 6 and 7, which go into great

detail about using

for two major areas of data visualization: networks and maps.

Along those lines, the use of

HTML5

canvas in chapters 8 and 11 is an area that even

experienced

developers might not be familiar with.

www.it-ebooks.info

ABOUT THIS BOOK

xvi

Regardless of your level of experience with

, I recommend you really spend

some time with chapter 10, which deals with the structure of layouts and components

while showing you how to build your own. Beginning to build modular, reusable com-

ponents and layouts will allow you to create not only effective data visualization, but

also an effective career in visualizing data.

Chapter 12 is available online only from the publisher’s website at www.manning

.com/

.jsinAction and is a fun read that will expand your horizons.

Online graphics

Most of the graphics in this book were created in color and are meant to be viewed in

color. The eBook versions do include color graphics, but the print book is printed in

grayscale. To view the color graphics, please refer to the eBook versions in

PDF

, ePub,

and Kindle formats, which are available to pBook owners for free after they register

their print book at www.manning.com/

.jsinAction.

About one third of the graphics in this book also have an online component. To

see the online graphic and the code that was used to generate it, please look for this

icon in the captions of certain figures:

In the eBook versions, clicking on the icon will take you to the interactive graphic

online. For print book readers, please go to the publisher’s website at www.manning

.com/

.jsinAction where you will find the interactive graphics listed by figure num-

ber. By clicking on the

URL

s for those figures, you will be able to view the graphics

online on your computer or tablet as you read the print book.

Code conventions

Initial code examples in chapters are complete, with later code examples that extend

an initial example only showing the code that has changed. It’s best to use the source

code and online examples alongside the text. The line lengths of some of the exam-

ples exceed the page width, and in cases like these, the

➥

marker is used to indicate

that a line has been wrapped for formatting.

All source code in listings or in text is in a

fixed-width

font

this

to separate

it from ordinary text. Code annotations accompany many of the listings, highlighting

important concepts.

Source code downloads

The source code for the examples in this book is available online from the pub-

lisher’s website at www.manning.com/

.jsinAction, and a list of all interactive ver-

sions is hosted on GitHub and can be found at emeeks.github.io/d3ia/.

Software requirements

.js requires a browser to run, and you should have a local web server installed on

your computer to host your code.

www.it-ebooks.info

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