FROM TH2F
constant
0.0358879771662052+-0.014529478577957814
chi2/ndof = 0.025504927796685423
plane
0.014743094911774364+-0.03761093869522982
invpt slope = 0.0025176833238656103+-0.006979055830181241
theta slope = 0.02542500741777618+-0.04572454617047315
chi2/ndof = 0.02355903916782014
from tgraph2D
constant
0.057311734348654095+-0.0027800472901888516
chi2/ndof = 0.0014452599689983871
plane
0.01820375347084039+-0.004150482124875281
invpt slope = 0.01474517141724623+-0.0008662446640771594
theta slope = 0.0016995357293715287+-0.005268106348477194
chi2/ndof = 0.000562512529087734