Visualforce Developer Guide
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Providing Chart Data via a JavaScript Array
You can use Visualforce
charting with non-Salesforce data
sources by building a JavaScript array, in your own JavaScript code in your page, and
providing the name of that array to <apex:chart>.
The following trivial code illustrates this
technique:
1<apex:page>
2 <script>
3 // Build the chart data array in JavaScript
4 var dataArray = new Array();
5 dataArray.push({'data1':33,'data2':66,'data3':80,'name':'Jan'});
6 dataArray.push({'data1':33,'data2':66,'data3':80,'name':'Feb'});
7 // ...
8 </script>
9
10 <apex:chart data="dataArray" ...></apex:chart>
11</apex:page>When using this technique, if your data is coming from a non-Salesforce source, you might not need any server-side Apex code at all.