Eye-catching graphics with the Google Charts API
Chart Your Heart Out
The Google Chart API is simple to use and easy to integrate into web applications. As shown here, you can use the API immediately – just embed a static link in your web page and let the browser request and render a chart each time the page is drawn.
To speed page rendering, you can request and cache the chart image on your own server, recreating the chart only when the underlying data changes. In addition to providing better efficiency, this technique better protects your raw data. A visitor to your site cannot "View Source" and copy the URL.
Of course, you can also mix the Google Chart API with AJAX techniques to modify charts on the fly in response to user input. Chart Maker  is a basic but effective demonstration of dynamic charting; others have used the Google Chart API to implement a loan calculator and executive dashboards.
Of course, Google Chart is often slower than charting tools that run on the desktop, such as Apple Numbers or Microsoft Excel. These latter applications use native drawing engines and do not require an Internet round-trip to transmit data and download a large graphic image. However, Google Chart is a free application that is available from anywhere. If you are serious about using Google Chart in a production setting, pre-flighting and caching can greatly improve response time.
- The pChart graphing framework for PHP: http://pchart.sourceforge.net/
- The Google Charts API documentation: http://code.google.com/apis/chart/
- BeeTagg: http://www.beetagg.com/
- Google's free Zebra Crossing barcode reader library: http://code.google.com/p/zxing/
- A guide to encoding data in QR codes: http://code.google.com/p/zxing/wiki/BarcodeContents
- A simple Google Chart generator: http://almaer.com/chartmaker/
- The JFreeChart charting library: http://www.jfree.org/jfreechart/
Buy this article as PDF
Spammers go low-volume, and 90% of IE browsers are unpatched.
Adobe scrambles to release patches for vulnerable Flash Player.
Four-inch-long computer on a stick lets you boot a full Linux system from any HDMI display device.
New statute would require companies to report break-ins to consumers.
Weird data transfer technique avoids all standard security measures.
FIDO alliance declares the beginning of the end for old-style login authentication.
The Linux New Media Awards have honored the most significant products, projects, people, and organizations for open source/Linux every year since 2000.
Legendary Uber-distro splits over the systemd controversy.
New LTS version offers many refinements for the Cinnamon and Mate desktops and significant improvement under the hood.
One of CeBIT’s most successful forums returns in 2015.