FROM TH2F
constant
0.011543300181191452+-0.012574871751946968
chi2/ndof = 0.010894454184811345
plane
0.08157105597456252+-0.10010980053036946
invpt slope = 0.0017574660117649138+-0.008887102008773844
theta slope = -0.056280583552667005+-0.08027752283617857
chi2/ndof = 0.004075660901345651
from tgraph2D
constant
0.02095512749632985+-0.0015963396751818518
chi2/ndof = 0.00020131572833159028
plane
0.08449544032624468+-0.004834305995105568
invpt slope = 0.004575210667456396+-0.0005936599992571257
theta slope = -0.06077780420705389+-0.0041130895234558875
chi2/ndof = 4.9990431165005636e-05