FROM TH2F
constant
0.014025312004702894+-0.012770474673378782
chi2/ndof = 0.01322112748407656
plane
0.07885911393672859+-0.08513657648390055
invpt slope = 0.00011598537288678816+-0.006893582278990651
theta slope = -0.05210199767657023+-0.0681435134539071
chi2/ndof = 0.006371297629236394
from tgraph2D
constant
0.02539221227243301+-0.0018147200711656514
chi2/ndof = 0.0003062684310963662
plane
0.08419768824875755+-0.005244363277960788
invpt slope = 0.004772560519686843+-0.0007501574711695761
theta slope = -0.060736419099423816+-0.0046450169139452425
chi2/ndof = 0.00010167355051937712