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
Report from the X-Force group says attackers are using TOR to hide their crimes
Future Firefox extensions will be compatible with Chrome.
Better read this if you bought your computer before 2011
Users should upgrade to the new version as soon as possible
Xen project announces a privilege escalation problem for Qemu host systems
Attackers can compromise an Android phone just by sending a text message
PC vendor will pre-install Ubuntu on portables in India.
More embarrassment for Adobe's embattled multimedia tool
Mozilla’s script blocker add-on could be putting malware sites on the whitelist.
The Internet community officially banishes the notoriously unsafe Secure Sockets Layer protocol.