Logo ROOT  
Reference Guide
Background_compton.C File Reference

Detailed Description

View in nbviewer Open in SWAN Example to illustrate the background estimator (class TSpectrum) including Compton edges.

void Background_compton() {
Int_t i;
const Int_t nbins = 256;
Double_t xmax = nbins;
Double_t source[nbins];
gROOT->ForceStyle();
TH1F *d1 = new TH1F("d1","",nbins,xmin,xmax);
TString dir = gROOT->GetTutorialDir();
TString file = dir+"/spectrum/TSpectrum.root";
TFile *f = new TFile(file.Data());
TH1F *back = (TH1F*) f->Get("back3");
back->SetTitle("Estimation of background with Compton edges under peaks");
back->GetXaxis()->SetRange(1,nbins);
back->Draw("L");
TSpectrum *s = new TSpectrum();
for (i = 0; i < nbins; i++) source[i]=back->GetBinContent(i + 1);
s->Background(source,nbins,10,TSpectrum::kBackDecreasingWindow,
for (i = 0; i < nbins; i++) d1->SetBinContent(i + 1,source[i]);
d1->Draw("SAME L");
}
#define f(i)
Definition: RSha256.hxx:104
int Int_t
Definition: RtypesCore.h:45
double Double_t
Definition: RtypesCore.h:59
const Bool_t kTRUE
Definition: RtypesCore.h:100
@ kRed
Definition: Rtypes.h:66
float xmin
Definition: THbookFile.cxx:95
float xmax
Definition: THbookFile.cxx:95
#define gROOT
Definition: TROOT.h:404
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition: TAttLine.h:40
virtual void SetRange(Int_t first=0, Int_t last=0)
Set the viewing range for the axis using bin numbers.
Definition: TAxis.cxx:947
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
Definition: TFile.h:54
1-D histogram with a float per channel (see TH1 documentation)}
Definition: TH1.h:574
void SetTitle(const char *title) override
See GetStatOverflows for more information.
Definition: TH1.cxx:6710
TAxis * GetXaxis()
Get the behaviour adopted by the object about the statoverflows. See EStatOverflows for more informat...
Definition: TH1.h:319
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition: TH1.cxx:3070
virtual void SetBinContent(Int_t bin, Double_t content)
Set bin content see convention for numbering bins in TH1::GetBin In case the bin number is greater th...
Definition: TH1.cxx:9099
virtual Double_t GetBinContent(Int_t bin) const
Return content of bin number bin.
Definition: TH1.cxx:5035
Advanced Spectra Processing.
Definition: TSpectrum.h:18
@ kBackOrder8
Definition: TSpectrum.h:40
@ kBackDecreasingWindow
Definition: TSpectrum.h:42
@ kBackSmoothing5
Definition: TSpectrum.h:44
Basic string class.
Definition: TString.h:136
static constexpr double s
Definition: file.py:1
Authors
Miroslav Morhac, Olivier Couet

Definition in file Background_compton.C.