Thank you for this post! I was able to use this to create a combination chart that pulls from a SharePoint list, however, I am having issues adding multiple charts (based on multiple lists) to the same SharePoint page. Every time I follow the steps above for a new Data View web part, the page still shows only one chart, but pulling data from the new list, as opposed to the old one. Where in the code can I fix this so that I have 2 charts?

Additionally, is there a way to change the @ names of the datafields in SharePoint Designer?