FROM TH2F
constant
0.021276033339590668+-0.014442595401326988
chi2/ndof = 0.020744683546089375
plane
0.0766628710198291+-0.09126004949582013
invpt slope = 0.008184314692985244+-0.009741084143114039
theta slope = -0.055036107498877725+-0.07014695168225352
chi2/ndof = 0.004045913527131947
from tgraph2D
constant
0.03930718862103124+-0.0026009180979542487
chi2/ndof = 0.0007373604697175377
plane
0.10375840688388094+-0.006813397155310332
invpt slope = 0.009784513719720531+-0.0008370399147635223
theta slope = -0.0805058473484267+-0.006018565492194991
chi2/ndof = 0.00020039137613144076