Any way to easily Log /Graph Stats over time?

I have a Trane ZWave tstat. I’d like to log the on/off cycling of the unit so I can have a historical record of the daily usage. Is this possible with a built-in function or maybe an add-on?

Eventually, I’d like to graph the daily hi/low temps for my area against the run time of my home unit and the home internal temps to find trends.

thx for the help

Check out @Chris’s dataMine plugin
http://forum.micasaverde.com/index.php/topic,7750.0.html

thx!