D3.js in Action by Elijah Meeks

By Elijah Meeks

D3.js in motion is a pragmatic instructional for growing interactive pix and data-driven purposes utilizing D3.js. You'll begin with in-depth factors of D3's out-of-the-box layouts, besides dozens of useful use instances that align with sorts of visualizations. Then, you'll discover functional strategies for content material construction, animation, and representing dynamic data—including interactive photographs and knowledge streamed reside over the net. the ultimate chapters assist you to use D3's wealthy interplay version because the origin for a whole net software. in spite of everything, you'll have the capacity to combine D3.js into your internet improvement method and rework any website right into a extra attractive and complicated person event.

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Select() syntax. log(person[x]);} The x in the loop represents each attribute in the person object. Each x will be one of the attributes such as name, age, and so on This allows you to iterate through the attributes using person[x] to show the value of that attribute of the object. json(), which you’ll see many times in later chapters. csv(), D3 imports the data as an array of JSON objects. We’ll look at objects more extensively as we use them later. 5 Infoviz standards expressed in D3 Information visualization has never been so popular as it is today.

We’ll look at geographic data closely in chapter 7. 5 Raw data As you’ll see in chapter 2, everything is data, including images or blocks of text. Although information visualization typically uses shapes encoded by color and size to represent data, sometimes the best way to represent it in D3 is with linear narrative text, an image, or a video. If you develop applications for an audience that needs to understand complex systems, but you consider the manipulation of text or images to be somehow separate from the representation of numerical or categorical data as shapes, then you arbitrarily reduce your capability to communicate.

Enter() function created three new

elements to reflect the size mismatch between the data array and the selection. 26 Inspecting the DOM shows that the new

elements have been created with unformatted content followed by the child element with style and content set by your code. Using HTML5 33 content was set to "Wow". A element with a different style was appended to the

, and its HTML content was set to "Even More Wow". There’s more you can do, but first you need to examine the array object you’re binding, and focus on JavaScript arrays and array functions.

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