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12.10.07
Google's Chart Serving API
 By
Nathan Weinberg
Google has this really cool new API that you can use to generate charts. By simply including parameters in a URL, you get a chart image with the chart coming out as whatever type and values you need.
The basic URL format is http://chart.apis.google.com/chart?cht=p3&chd
=t:90,49&chs=350x150&chl=Foo|Bar, and you change it up by altering some of the parameters.
There are five types of charts:
Line (by changing cht= to lc):
That creates a chart with only x values for each point on the line. You can create more than one line, and each point is evenly spaced. If you need points that are not evenly spaced and have both x and y values, use lxy instead of lc, like so:
Next up are bar charts, by changing the parameter to bhs for a horizontal bar chart and bvs for a vertical bar chart, plus chco= for the chart colors. Examples:
Continue reading this article.
About the Author:
Nathan Weinberg writes the popular InsideGoogle blog, offering the latest news and insights about Google and search engines.
Visit the InsideGoogle blog.
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