FROM TH2F
constant
0.027865120757264876+-0.01927524172200297
chi2/ndof = 0.008083200043247108
plane
-0.03859846473521958+-0.16562807462582665
invpt slope = 0.006529027278061258+-0.011632956931928683
theta slope = 0.0428884041537366+-0.1402672207401518
chi2/ndof = 0.002631878041031344
from tgraph2D
constant
0.03479016382641084+-0.001699691035823112
chi2/ndof = 0.00022822701976629202
plane
-0.004448940805072527+-0.008095162334050311
invpt slope = 0.006555398192214441+-0.0005154061749763043
theta slope = 0.01611417883585446+-0.0066665983292569595
chi2/ndof = 7.29377138958406e-05