ROOT TTree comparison utilities from the OSU team.
How to do this.
git clone this
To compare histograms
run setup.sh it assumes you've set WHEREIPUTMYCODE to directory where you put this code (for example APP)
Then type
cmake HistComp make ln -s libTUPLECOMPARISON.so libTUPLECOMPARISON.dylib
python runcompare.py <hist1.root> <hist2.root> <output.html>