Logo ROOT  
Reference Guide
 
Loading...
Searching...
No Matches
SearchHR1.C File Reference

Detailed Description

View in nbviewer Open in SWAN
Example to illustrate high resolution peak searching function (class TSpectrum).

Found 11 candidate peaks
posx= 351.500000, posy= 5492.546875
posx= 289.500000, posy= 4819.614258
posx= 645.500000, posy= 5924.250000
posx= 445.500000, posy= 5238.460938
posx= 540.500000, posy= 5092.015625
posx= 600.500000, posy= 5099.656250
posx= 873.500000, posy= 4961.125000
posx= 927.500000, posy= 4711.515625
posx= 705.500000, posy= 4609.722656
posx= 987.500000, posy= 4136.967773
posx= 777.500000, posy= 4112.816406
void SearchHR1() {
Double_t fPositionX[100];
Double_t fPositionY[100];
Int_t fNPeaks = 0;
Int_t i,nfound,bin;
const Int_t nbins = 1024;
Double_t xmax = nbins;
Double_t source[nbins], dest[nbins];
gROOT->ForceStyle();
TString dir = gROOT->GetTutorialDir();
TString file = dir+"/spectrum/TSpectrum.root";
TFile *f = new TFile(file.Data());
TH1F *h = (TH1F*) f->Get("back2");
h->SetTitle("High resolution peak searching, number of iterations = 3");
h->GetXaxis()->SetRange(1,nbins);
TH1F *d = new TH1F("d","",nbins,xmin,xmax);
h->Draw("L");
for (i = 0; i < nbins; i++) source[i]=h->GetBinContent(i + 1);
h->Draw("L");
TSpectrum *s = new TSpectrum();
nfound = s->SearchHighRes(source, dest, nbins, 8, 2, kTRUE, 3, kTRUE, 3);
Double_t *xpeaks = s->GetPositionX();
for (i = 0; i < nfound; i++) {
a=xpeaks[i];
bin = 1 + Int_t(a + 0.5);
fPositionX[i] = h->GetBinCenter(bin);
fPositionY[i] = h->GetBinContent(bin);
}
TPolyMarker * pm = (TPolyMarker*)h->GetListOfFunctions()->FindObject("TPolyMarker");
if (pm) {
h->GetListOfFunctions()->Remove(pm);
delete pm;
}
pm = new TPolyMarker(nfound, fPositionX, fPositionY);
h->GetListOfFunctions()->Add(pm);
pm->SetMarkerStyle(23);
pm->SetMarkerSize(1.3);
for (i = 0; i < nbins; i++) d->SetBinContent(i + 1,dest[i]);
d->SetLineColor(kRed);
d->Draw("SAME");
printf("Found %d candidate peaks\n",nfound);
for( i=0;i<nfound;i++) printf("posx= %f, posy= %f\n",fPositionX[i], fPositionY[i]);
}
#define d(i)
Definition RSha256.hxx:102
#define f(i)
Definition RSha256.hxx:104
#define a(i)
Definition RSha256.hxx:99
#define h(i)
Definition RSha256.hxx:106
int Int_t
Definition RtypesCore.h:45
double Double_t
Definition RtypesCore.h:59
constexpr Bool_t kTRUE
Definition RtypesCore.h:100
@ kRed
Definition Rtypes.h:66
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t dest
float xmin
float xmax
#define gROOT
Definition TROOT.h:407
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition TAttMarker.h:38
virtual void SetMarkerStyle(Style_t mstyle=1)
Set the marker style.
Definition TAttMarker.h:40
virtual void SetMarkerSize(Size_t msize=1)
Set the marker size.
Definition TAttMarker.h:45
A ROOT file is an on-disk file, usually with extension .root, that stores objects in a file-system-li...
Definition TFile.h:53
1-D histogram with a float per channel (see TH1 documentation)
Definition TH1.h:622
void SetTitle(const char *title) override
Change/set the title.
Definition TH1.cxx:6709
virtual TObject * FindObject(const char *name) const
Must be redefined in derived classes.
Definition TObject.cxx:402
A PolyMarker is defined by an array on N points in a 2-D space.
Definition TPolyMarker.h:31
Advanced Spectra Processing.
Definition TSpectrum.h:18
Int_t SearchHighRes(Double_t *source, Double_t *destVector, Int_t ssize, Double_t sigma, Double_t threshold, bool backgroundRemove, Int_t deconIterations, bool markov, Int_t averWindow)
One-dimensional high-resolution peak search function.
Double_t * GetPositionX() const
Definition TSpectrum.h:58
Basic string class.
Definition TString.h:139
const char * Data() const
Definition TString.h:376
Authors
Miroslav Morhac, Olivier Couet

Definition in file SearchHR1.C.