FROM TH2F
constant
0.01640417999121819+-0.01711525008593234
chi2/ndof = 0.0050854112424559735
plane
0.004086594415344605+-0.04098798781503641
invpt slope = 0.016029153549121974+-0.03111840912458499
theta slope = 0.001115938598381601+-0.057408178350813556
chi2/ndof = 0.0002677297662939754
from tgraph2D
constant
0.01798688717691589+-0.001394491885727029
chi2/ndof = 0.00013806714097414942
plane
0.004283806671925768+-0.0007824453009748062
invpt slope = 0.015896960497374116+-0.0005227535343182671
theta slope = 0.00198518708277807+-0.0011880695563592904
chi2/ndof = 9.580282405020272e-06