Integral of the two functions for a double gaus fit

[kkabita]

I have a 1D plot that needs to be fit by a double gaus function. Then , I need the integral (counts under the curve) for each of the gaus fir separately. Please suggest.

[Wile_E_Coyote]

ROOT Forum → Search → “gausn(3)”

A simple, standalone dedicated simulation (a “toy MC”) can be found here:

Should we use integral method in TF1 or GetBinContent method in TH1 to get the integral from overlapping Gaussian peaks?

Play with a simple, dedicated simulation (a “toy MC”). The histogram is filled with each component separately (it is the preferred method, I guess): { Bool_t bg_pol2 = kFALSE; // simulate a "pol2" or a "broken line" background // gRandom->SetSeed(0); // make it "really random" // gStyle->SetOptFit(); // print fit parameters in the statistics box ROOT::Math::MinimizerOptions::SetDefaultMinimizer("Minuit2"); Int_t n = 200; // number of bins Double_t xl = 360., xr = xl + n; // make s…