FROM TH2F
constant
0.018165621271872864+-0.016465985419681656
chi2/ndof = 0.006106834268209439
plane
0.06294551667778311+-0.15309278506322677
invpt slope = -0.0009204556653864222+-0.0092411979285483
theta slope = -0.0331055239620768+-0.12132099952061694
chi2/ndof = 0.004759061418129791
from tgraph2D
constant
0.023385626463765127+-0.0014132666345715045
chi2/ndof = 0.00014380722578626035
plane
0.08125646831320342+-0.008542216776781747
invpt slope = 0.0013606432085400434+-0.0006752513893713167
theta slope = -0.049058494146447834+-0.006901287440556435
chi2/ndof = 8.480263711303983e-05