FROM TH2F
constant
0.028181778834923635+-0.015015133395379377
chi2/ndof = 0.026545072340808648
plane
0.00918761177475631+-0.03202782754789671
invpt slope = 0.018151686586194784+-0.01229279727981641
theta slope = -0.008889109677954036+-0.04989063030823251
chi2/ndof = 0.008755694271677269
from tgraph2D
constant
0.04924467820633431+-0.003191078443365799
chi2/ndof = 0.0014256174286720565
plane
0.007070284517677356+-0.0035567429442205476
invpt slope = 0.022568667305178904+-0.0011301486388206872
theta slope = -0.00774331836618141+-0.0052857374180730315
chi2/ndof = 0.0003541834935090005