FROM TH2F
constant
0.016724833816557552+-0.014737897881098146
chi2/ndof = 0.004364667622588179
plane
0.004888698924939791+-0.034969963578547945
invpt slope = 0.01255754340185091+-0.022173435726117834
theta slope = 0.0018180356142971216+-0.04222640580330278
chi2/ndof = 0.00012174829959422424
from tgraph2D
constant
0.018166110781779595+-0.0010207693050902742
chi2/ndof = 9.794517757584473e-05
plane
0.00505230038039258+-0.0003476372747003442
invpt slope = 0.012157663705054396+-0.0002016960760548775
theta slope = 0.0023995111551721555+-0.0004368156431860461
chi2/ndof = 2.3809472930794647e-06