FROM TH2F
constant
0.010994907015954373+-0.011872672251130582
chi2/ndof = 0.015240798968529983
plane
0.0046781158107326365+-0.12042001868515498
invpt slope = 0.006109286881678186+-0.00619763692093111
theta slope = -0.0033791721581634807+-0.11295711445507685
chi2/ndof = 0.001374755528555295
from tgraph2D
constant
0.024833838549963863+-0.0016497860426607361
chi2/ndof = 0.0002231871069116061
plane
0.040943760383224045+-0.005749497768839498
invpt slope = 0.0057721877152394725+-0.00022073481232441964
theta slope = -0.03331652878752685+-0.005037379271070061
chi2/ndof = 2.2413925102341035e-05