https://github.com/root-project/root
Tip revision: 5144c5868b7741f18a272976bf3e967ad98bd44b authored by Axel Naumann on 18 August 2020, 14:13:10 UTC
"Update ROOT version files to v6.20/08."
"Update ROOT version files to v6.20/08."
Tip revision: 5144c58
Background_smooth.C
/// \file
/// \ingroup tutorial_spectrum
/// \notebook
/// Example to illustrate the background estimator (class TSpectrum) including
/// Compton edges.
///
/// \macro_image
/// \macro_code
///
/// \authors Miroslav Morhac, Olivier Couet
void Background_smooth() {
Int_t i;
const Int_t nbins = 4096;
Double_t xmin = 0;
Double_t xmax = nbins;
Double_t source[nbins];
gROOT->ForceStyle();
TH1F *d1 = new TH1F("d1","",nbins,xmin,xmax);
TH1F *d2 = new TH1F("d2","",nbins,xmin,xmax);
TString dir = gROOT->GetTutorialDir();
TString file = dir+"/spectrum/TSpectrum.root";
TFile *f = new TFile(file.Data());
TH1F *back = (TH1F*) f->Get("back1");
back->SetTitle("Estimation of background with noise");
back->SetAxisRange(3460,3830);
back->Draw("L");
TSpectrum *s = new TSpectrum();
for (i = 0; i < nbins; i++) source[i]=back->GetBinContent(i + 1);
s->Background(source,nbins,6,TSpectrum::kBackDecreasingWindow,
TSpectrum::kBackOrder2,kFALSE,
TSpectrum::kBackSmoothing3,kFALSE);
for (i = 0; i < nbins; i++) d1->SetBinContent(i + 1,source[i]);
d1->SetLineColor(kRed);
d1->Draw("SAME L");
for (i = 0; i < nbins; i++) source[i]=back->GetBinContent(i + 1);
s->Background(source,nbins,6,TSpectrum::kBackDecreasingWindow,
TSpectrum::kBackOrder2,kTRUE,
TSpectrum::kBackSmoothing3,kFALSE);
for (i = 0; i < nbins; i++) d2->SetBinContent(i + 1,source[i]);
d2->SetLineColor(kBlue);
d2->Draw("SAME L");
}