FROM TH2F
constant
0.017700006685871402+-0.01637626085465568
chi2/ndof = 0.013351776585497133
plane
0.031214343154653743+-0.08539674481228579
invpt slope = -0.002495957413723343+-0.0106345452843377
theta slope = -0.0062544528788017455+-0.07149730227418544
chi2/ndof = 0.012564083865348106
from tgraph2D
constant
0.029496721629469112+-0.002044723525830523
chi2/ndof = 0.00029684349509097866
plane
0.06425273730766297+-0.008865160209368157
invpt slope = 0.005346490046997106+-0.0013637865649538089
theta slope = -0.03798222438479537+-0.007259086046229333
chi2/ndof = 0.00019307773341045484