FROM TH2F
constant
0.005934554317232824+-0.009863456578265732
chi2/ndof = 0.004188528423197547
plane
0.018742165088350336+-0.09574324390017917
invpt slope = -0.0007834787362537954+-0.0027580949593993143
theta slope = -0.007406690443802032+-0.07814749143656564
chi2/ndof = 0.0024710859361646445
from tgraph2D
constant
0.009890850455283911+-0.0006845155924160433
chi2/ndof = 3.0925065353256945e-05
plane
0.027912987714811925+-0.005699823120158292
invpt slope = -0.00021707526228085643+-0.00028291071185182194
theta slope = -0.014404892782011097+-0.004649767320082289
chi2/ndof = 2.73942264461002e-05