Area peak integration

Newbie
1

Hello,fellor root users. Im now struggling with intehration of peak (area of peak calculation). Here is part of my code where i do this

 double integralRangeStart = f->GetParameter(1) - 3 * f->GetParameter(2);
  double integralRangeEnd = f->GetParameter(1) + 3 * f->GetParameter(2);
  // double area = f->Integral(integralRangeStart, integralRangeEnd);
  int bin1 = h1->FindBin(integralRangeStart);
  int bin2 = h1->FindBin(integralRangeEnd);
 double area = h1->Integral(bin1, bin2, "width"); 
  std::cout << "Integral of the peak (area): " << area << std::endl;

Here i calculate area of whole fitted peak. the question is how i can subtract from whole area an area of background ?

2

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