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HTML5 Graphing and Data Visualization Cookbook

You're reading from   HTML5 Graphing and Data Visualization Cookbook Get a complete grounding in the exciting visual world of Canvas and HTML5 using this recipe-packed cookbook. Learn to create charts and graphs, draw complex shapes, add interactivity, work with Google maps, and much more.

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Product type Paperback
Published in Nov 2012
Publisher Packt
ISBN-13 9781849693707
Length 344 pages
Edition 1st Edition
Languages
Tools
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Author (1):
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Ben Fhala Ben Fhala
Author Profile Icon Ben Fhala
Ben Fhala
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Toc

Table of Contents (17) Chapters Close

HTML5 Graphing and Data Visualization Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
1. Drawing Shapes in Canvas 2. Advanced Drawing in Canvas FREE CHAPTER 3. Creating Cartesian-based Graphs 4. Let's Curve Things Up 5. Getting Out of the Box 6. Bringing Static Things to Life 7. Depending on the Open Source Sphere 8. Playing with Google Charts 9. Using Google Maps 10. Maps in Action Index

Leveraging a radar


Radars are very misunderstood charts but are really amazing. A radar enables us to showcase a really large amount of comparable data in a very condensed way. The radar chart is known as a spider chart as well.

Tip

Warning

You really need to be friendly with the Math.cos and Math.sin functions, as we are going to use them plenty of times in this chart type. With that said, if you don't feel comfortable with them yet, it would be a good idea to start from the start of the chapter to refresh your memory on this.

Getting ready

As always, we are going to start with our base HTML page with an init callback.

Tip

Note

A radar chart is really a line chart wrapped up into a circular shape with a lot of different math involved; but it's the same idea—instead of spreading our data horizontally, we are spreading our data around a center point.

How to do it...

Let's see what are the steps involved in creating a radar chart:

  1. Create/Organize the chart data and the actual data:

    var data=[{label:"Ben...
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