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Background_width2.C
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1/// \file
2/// \ingroup tutorial_spectrum
3/// Example to illustrate the influence of the clipping window width on the
4/// estimated background.
5///
6/// \macro_image
7/// \macro_code
8///
9/// \authors Miroslav Morhac, Olivier Couet
10
12{
13 Int_t i;
14 const Int_t nbins = 4096;
15 Double_t xmin = 0;
16 Double_t xmax = 4096;
17 Double_t source[nbins];
18 gROOT->ForceStyle();
19
20 TH1F *d1 = new TH1F("d1", "", nbins, xmin, xmax);
21 TH1F *d2 = new TH1F("d2", "", nbins, xmin, xmax);
22 TH1F *d3 = new TH1F("d3", "", nbins, xmin, xmax);
23 TH1F *d4 = new TH1F("d4", "", nbins, xmin, xmax);
24
25 TString dir = gROOT->GetTutorialDir();
26 TString file = dir + "/legacy/spectrum/TSpectrum.root";
27 TFile *f = new TFile(file.Data());
28 TH1F *back = (TH1F *)f->Get("back2");
29
30 back->SetTitle("Influence of clipping window width on the estimated background");
31 back->SetAxisRange(0, 1000);
32 back->SetMaximum(7000);
33 back->Draw("L");
34
35 TSpectrum *s = new TSpectrum();
36
37 for (i = 0; i < nbins; i++)
38 source[i] = back->GetBinContent(i + 1);
41 for (i = 0; i < nbins; i++)
42 d1->SetBinContent(i + 1, source[i]);
43 d1->SetLineColor(kRed);
44 d1->Draw("SAME L");
45
46 for (i = 0; i < nbins; i++)
47 source[i] = back->GetBinContent(i + 1);
50 for (i = 0; i < nbins; i++)
51 d2->SetBinContent(i + 1, source[i]);
52 d2->SetLineColor(kBlue);
53 d2->Draw("SAME L");
54
55 for (i = 0; i < nbins; i++)
56 source[i] = back->GetBinContent(i + 1);
59 for (i = 0; i < nbins; i++)
60 d3->SetBinContent(i + 1, source[i]);
61 d3->SetLineColor(kGreen);
62 d3->Draw("SAME L");
63
64 for (i = 0; i < nbins; i++)
65 source[i] = back->GetBinContent(i + 1);
68 for (i = 0; i < nbins; i++)
69 d4->SetBinContent(i + 1, source[i]);
70 d4->SetLineColor(kMagenta);
71 d4->Draw("SAME L");
72}
#define f(i)
Definition RSha256.hxx:104
int Int_t
Definition RtypesCore.h:45
constexpr Bool_t kFALSE
Definition RtypesCore.h:94
double Double_t
Definition RtypesCore.h:59
@ kRed
Definition Rtypes.h:66
@ kGreen
Definition Rtypes.h:66
@ kMagenta
Definition Rtypes.h:66
@ kBlue
Definition Rtypes.h:66
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
float xmin
float xmax
#define gROOT
Definition TROOT.h:406
A ROOT file is an on-disk file, usually with extension .root, that stores objects in a file-system-li...
Definition TFile.h:131
1-D histogram with a float per channel (see TH1 documentation)
Definition TH1.h:645
void SetTitle(const char *title) override
Change/set the title.
Definition TH1.cxx:6716
virtual void SetMaximum(Double_t maximum=-1111)
Definition TH1.h:420
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition TH1.cxx:3037
virtual Double_t GetBinContent(Int_t bin) const
Return content of bin number bin.
Definition TH1.cxx:5059
virtual void SetAxisRange(Double_t xmin, Double_t xmax, Option_t *axis="X")
Set the "axis" range.
Definition Haxis.cxx:201
Advanced Spectra Processing.
Definition TSpectrum.h:18
virtual TH1 * Background(const TH1 *hist, Int_t niter=20, Option_t *option="")
One-dimensional background estimation function.
@ kBackOrder2
Definition TSpectrum.h:37
@ kBackDecreasingWindow
Definition TSpectrum.h:42
@ kBackSmoothing3
Definition TSpectrum.h:43
Basic string class.
Definition TString.h:139
const char * Data() const
Definition TString.h:376