Thank you very much for using RadChart and for your feedback.
There is bug with our MVVM data-binding mechanism and Nullable types. We will fix the problem for the upcoming BETA when we are planning to add support for Empty (null value) data points.
Currently supported are only Categorical series, which expect a Categorical (or a DateTime) axis to be specified in order to be correctly plotted. For the official release we will add the so called "Scatter" series - ScatterLine, ScatterArea, etc., which will be plotted by two linear axes.
We are just completing the chart documentation and it should be available on-line tomorrow. We also plan to add a Design-time Chart Gallery, which will allow you to select a predefined chart template to start from.
I have added 1000 Telerik points to your account for bringing our attention to the bug with Nullable types. Please, do not hesitate to contact us with any question/problem you may have - we will be glad to help.
the Telerik team
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