I will be posting a spreadsheet after Week 1 regarding advanced stats including OPR and a few other metrics.
I have done these spreadsheets the last few years and they can be found here:
http://www.chiefdelphi.com/media/papers/3003
http://www.chiefdelphi.com/media/papers/2967
In addition, I have an app on the google play store called OPRFIRST2014 that was developed to focus specifically on OPR calculations for android. I released the entire source code for it because TheBlueAlliance began to include OPR calculations in their app and it was too hard to gain users with everyone using thebluealliance.com. So feel free to look through here and use the code to calculate OPR. (Although I may warn you, the code may be a little hard to read because I was just beginning android development and this was the first app I created).
https://github.com/mray19027/OPRFIRST2014
The EXACT location of where my OPR calculations take place is here:
https://github.com/mray19027/OPRFIRS...Info.java#L305