Raphael line graph animation graph and update graph

im new for raphael library, so i'm still learning my way around it, i managed to set my schedule the way i want it, but now i am trying to do the following 2 things, but i have dificulty to search for documents / examples for what i want.

here is what i have so far
http://jsfiddle.net/PA67H/

• revitalize data source points when a chart loads with something similar to this
• animate the change in the data points, so when you click the button, the data source changes to var2, but in an animated way, for example.