Logo ROOT   6.08/07
Reference Guide
Smoothing.C File Reference

Detailed Description

View in nbviewer Open in SWAN Example to illustrate smoothing using Markov algorithm (class TSpectrum).

pict1_Smoothing.C.png
void Smoothing() {
Int_t i;
const Int_t nbins = 1024;
Double_t xmin = 0;
Double_t xmax = nbins;
Double_t source[nbins];
gROOT->ForceStyle();
TString dir = gROOT->GetTutorialsDir();
TString file = dir+"/spectrum/TSpectrum.root";
TFile *f = new TFile(file.Data());
TH1F *h = (TH1F*) f->Get("back1");
h->SetTitle("Smoothed spectrum for m=3");
for (i = 0; i < nbins; i++) source[i]=h->GetBinContent(i + 1);
h->SetAxisRange(1,1024);
h->Draw("L");
TSpectrum *s = new TSpectrum();
TH1F *smooth = new TH1F("smooth","smooth",nbins,0.,nbins);
smooth->SetLineColor(kRed);
s->SmoothMarkov(source,1024,3); //3, 7, 10
for (i = 0; i < nbins; i++) smooth->SetBinContent(i + 1,source[i]);
smooth->Draw("L SAME");
}
Author
Miroslav Morhac

Definition in file Smoothing.C.