Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

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:

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.