Data example for Radar?

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Hello, sample data renders JS error on radar types.

nvd3.self-f952d22d517e888c44e6bf49a58aba336ffdf6b306e978fd396e050150df4ea2.js?body=1:22 Uncaught ReferenceError: d3 is not defined
    at nvd3.self-f952d22d517e888c44e6bf49a58aba336ffdf6b306e978fd396e050150df4ea2.js?body=1:22
    at nvd3.self-f952d22d517e888c44e6bf49a58aba336ffdf6b306e978fd396e050150df4ea2.js?body=1:15425
(anonymous) @ nvd3.self-f952d22d517e888c44e6bf49a58aba336ffdf6b306e978fd396e050150df4ea2.js?body=1:22
(anonymous) @ nvd3.self-f952d22d517e888c44e6bf49a58aba336ffdf6b306e978fd396e050150df4ea2.js?body=1:15425
chart.self-fd14d3b9af2040b3f73dce5df87d357f24b5df47af973d28fbc5d9a4b39ae8b9.js?body=1:3587 Uncaught TypeError: Cannot read property '0' of undefined
    at ChartType.buildScale (chart.self-fd14d3b9af2040b3f73dce5df87d357f24b5df47af973d28fbc5d9a4b39ae8b9.js?body=1:3587)
    at ChartType.initialize (chart.self-fd14d3b9af2040b3f73dce5df87d357f24b5df47af973d28fbc5d9a4b39ae8b9.js?body=1:3470)
    at ChartType.Chart.Type (chart.self-fd14d3b9af2040b3f73dce5df87d357f24b5df47af973d28fbc5d9a4b39ae8b9.js?body=1:915)
    at new ChartType (chart.self-fd14d3b9af2040b3f73dce5df87d357f24b5df47af973d28fbc5d9a4b39ae8b9.js?body=1:1150)
    at Chart.<computed> [as Radar] (chart.self-fd14d3b9af2040b3f73dce5df87d357f24b5df47af973d28fbc5d9a4b39ae8b9.js?body=1:1178)
    at 123:119

I am using a copy paste from the sample data.
Where can i get information on how to build the JSON object needed to generate the Radar graph?
Thanks,