FROM TH2F
constant
0.03277753909565316+-0.020116186938011888
chi2/ndof = 0.008516737145792461
plane
0.009513191930371881+-0.04851748113942045
invpt slope = 0.02179410944485721+-0.027448490012690854
theta slope = 0.0025169009166737173+-0.06263310963891987
chi2/ndof = 0.000616232771550407
from tgraph2D
constant
0.03710039297170354+-0.0020931362988029596
chi2/ndof = 0.00042497829783750125
plane
0.011758112977769814+-0.0014624119003915643
invpt slope = 0.02159056564598165+-0.0007337255054482056
theta slope = 0.00182735819958422+-0.0019879028995965584
chi2/ndof = 4.202869607154407e-05