Delete Some History

Is there any way to delete a bit of previous history without dumping the whole graph? I was messing with the pit before I got my butt on and was hoping to clean up the chart. I should have dumped it just before I threw it on.

Nope, sorry, there's only reset. The database isn't very full-featured, so the only way to remove data from it is to dump it out to XML, delete the sections from the XML that you don't want, then re-impoort all the data. Also you can't do this on the HeaterMeter's Pi itself since it doesn't have libxml and all the other prerequisites.