FROM TH2F
constant
0.021763801773505904+-0.016922346550713174
chi2/ndof = 0.01184232863940232
plane
-0.0654658810164856+-0.13939851204282386
invpt slope = 0.0066551141157541235+-0.011136908035707589
theta slope = 0.0631077430939134+-0.12300926650331027
chi2/ndof = 0.0028678628165551877
from tgraph2D
constant
0.03273177084401546+-0.0014955894649532444
chi2/ndof = 0.00017894302781278374
plane
-0.0152953446646664+-0.005851661983249315
invpt slope = 0.00611597386896377+-0.00033893096860781324
theta slope = 0.024740957073080938+-0.004839513270561269
chi2/ndof = 3.282682923769125e-05