Will or is?.. We plan to add more chart types in the future, so yeah, will this be possible with groov? One day - soonish.
Is? Today, not by using the trend gadget…
The only way (pure groov way) I can think of is to be a little creative. Mary talked about making different types of graphs out of the different gadgets in a post here; Historian Plot In Groov
This is one way to do this today by just using groov.
Another way would be to use an external graphing package and have it build an image of the graph and then use the groov Video Camera gadget to link to that graphic.
Since I already have it set up, I would use JPGraph Plot a graph from MySQL data But its a bit of work to start from scratch. There are faster learn graphing packages out there today.
Lets know how you end up visualizing the data Philip. 15 minute energy use is not going away any time soon and its important to show that data to the end user.