Hi experts. I now want to fit pol1+gaus and pol1 respectively to the histogram. So I used the code below. double initparms_f1[] = {1,1,5, 3.2, 6.76268e-1}; TF1 *f1 = new TF1("f1","pol1(0)+gaus(2)"); f1->SetParameters(initparms_f1); f1->FixParameter(3, 3.2); f1->FixParameter(4, 6.76268e-1); f1->Set…

Fitting, Integral

Wile_E_Coyote August 6, 2021, 7:37am 2

Getting area under a Gaussian peak Newbie

See this old post (in the old “TH1F variable bin width” thread) and / or that old post (in the old “How to find the area error using peakfind.C" thread).

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