Hi, You access the result of the fit via TF1 *func = htemp->GetFunction("pol1"); double p0 = func->GetParameter(0); double p1 = func->GetParameter(1); Rene Brun Gunasingha Rathnayaka wrote: > > Hi, > I am drawing a profile and do a linear fitting using "pol1". I can > read the value of p0 and p1 from the graph when I do the fitting. > this is what I am doing. > > ntuple->Draw("yvalue:xvalue","cond1==7&&cond2==3","profs") > htemp->Fit("pol1") > htemp->GetEntries() > > How can I get values of p0 and p1 ( constant and slope) in > The same way I get htemp->GetEntries() { without looking at plot} > > When I hit tab it gives me all the option for htemp->Get , but I could > not find anything for p0 and p1. > > I am using ROOT Version 3.10/01 in REDHAT8 machine ( gcc3.2) machine. > > Thank you, > > Gunasingha
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