I am sorry to say that currently neither RadHtmlChart not RadChart support the desired chart type. Such a feature request, however, has already been logged in our feedback portal here
, so that you can monitor, comment and vote on it. As more and more people vote on particular item its priority for implementation raises.
You can also find useful RadHtmlChart vs. RadChart, round 2. Which one is right for me?
blog post by Marin Bratanov that sheds more light on the pros and cons of both charts.
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed