FROM TH2F
constant
0.025820704715833944+-0.015910504821713724
chi2/ndof = 0.02404426134613378
plane
0.0024427633473215558+-0.037300525046890555
invpt slope = 0.023483873754816476+-0.016393601417146304
theta slope = -0.003055707311295177+-0.054152621541170995
chi2/ndof = 0.0037492801876303473
from tgraph2D
constant
0.04395905170454011+-0.003362493454236811
chi2/ndof = 0.0013228443809668712
plane
0.003114249543836157+-0.0030845681493663446
invpt slope = 0.02628455901286078+-0.0010354639995787168
theta slope = -0.006120312631556931+-0.004529108851502006
chi2/ndof = 0.0002021189578736192