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Designing with Progressive Enhancement: Building the Web that Works for Everyone by Maggie Costello Wachs, Scott Jehl, Patty Toland, Todd Parker

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Chapter Twelve. Charts with Html5 Canvas

Presenting complex data graphically—as a pie, line, area, or bar chart—is a powerful way to convey information and illuminate patterns and trends that would be much harder to spot poring over large tables of numbers. More and more on the web, we see charts and graphs used to deliver key information, including:

• Comparisons of statistical numbers or percentages, like voting or opinion poll results

• Tracking simple activity or performance information over time, like the number of users accessing a website, instances of news stories about a topic, or stock share prices

• Displays of complex financial or scientific trend data with moving averages, minimum and maximum values visualized to correlations, and ...

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