FROM TH2F
constant
0.019561250666545047+-0.017215765619505764
chi2/ndof = 0.025880358833162392
plane
0.001366900676158449+-0.039753856515796514
invpt slope = 0.03484245469191982+-0.029467998403077414
theta slope = -0.006794599013816803+-0.053087465466889985
chi2/ndof = 0.004244281507825541
from tgraph2D
constant
0.0376788216995213+-0.0037984680646457347
chi2/ndof = 0.0011686971308897103
plane
0.0033829098448034845+-0.0033491091645813584
invpt slope = 0.038308264328217954+-0.0020249128628729426
theta slope = -0.00829741972933312+-0.005058001259490627
chi2/ndof = 0.00021208480544858557