//____________________________________________________________________
void fitCircle(Int_t n=10000) {
//generates n points around a circle and fit them
TCanvas *c1 = new TCanvas("c1","c1",600,600);
c1->SetGrid();
gr = new TGraph(n);
if (n> 999) gr->SetMarkerStyle(1);
else gr->SetMarkerStyle(3);
TRandom3 r;
Double_t x,y;
for (Int_t i=0;i<n;i++) {
r.Circle(x,y,r.Gaus(4,0.3));
gr->SetPoint(i,x,y);
}
c1->DrawFrame(-5,-5,5,5);
gr->Draw("p");
//Fit a circle to the graph points
TVirtualFitter::SetDefaultFitter("Minuit"); //default is Minuit
TVirtualFitter *fitter = TVirtualFitter::Fitter(0, 3);
fitter->SetFCN(myfcn);
fitter->SetParameter(0, "x0", 0, 0.1, 0,0);
fitter->SetParameter(1, "y0", 0, 0.1, 0,0);
fitter->SetParameter(2, "R", 1, 0.1, 0,0);
Double_t arglist[1] = {0};
fitter->ExecuteCommand("MIGRAD", arglist, 0);
//Draw the circle on top of the points
TArc *arc = new TArc(fitter->GetParameter(0),
fitter->GetParameter(1),fitter->GetParameter(2));
arc->SetLineColor(kRed);
arc->SetLineWidth(4);
arc->Draw();
}
//____________________________________________________________________
void fitCircle(Int_t n=10000) {
//generates n points around a circle and fit them
TCanvas *c1 = new TCanvas("c1","c1",600,600);
c1->SetGrid();
gr = new TGraph(n);
if (n> 999) gr->SetMarkerStyle(1);
else gr->SetMarkerStyle(3);
TRandom3 r;
Double_t x,y;
for (Int_t i=0;i<n;i++) {
r.Circle(x,y,r.Gaus(4,0.3));
gr->SetPoint(i,x,y);
}
c1->DrawFrame(-5,-5,5,5);
gr->Draw("p");
auto chi2Function = [&](const Double_t *par) {
//minimisation function computing the sum of squares of residuals
// looping at the graph points
Int_t np = gr->GetN();
Double_t f = 0;
Double_t *x = gr->GetX();
Double_t *y = gr->GetY();
for (Int_t i=0;i<np;i++) {
Double_t u = x[i] - par[0];
Double_t v = y[i] - par[1];
Double_t dr = par[2] - std::sqrt(u*u+v*v);
f += dr*dr;
}
return f;
};
// wrap chi2 funciton in a function object for the fit
// 3 is the number of fit parameters (size of array par)
ROOT::Math::Functor fcn(chi2Function,3);
ROOT::Fit::Fitter fitter;
double pStart[3] = {0,0,1};
fitter.SetFCN(fcn, pStart);
fitter.Config().ParSettings(0).SetName("x0");
fitter.Config().ParSettings(1).SetName("y0");
fitter.Config().ParSettings(2).SetName("R");
// do the fit
bool ok = fitter.FitFCN();
if (!ok) {
Error("line3Dfit","Line3D Fit failed");
}
const ROOT::Fit::FitResult & result = fitter.Result();
result.Print(std::cout);
//Draw the circle on top of the points
TArc *arc = new TArc(result.Parameter(0),result.Parameter(1),result.Parameter(2));
arc->SetLineColor(kRed);
arc->SetLineWidth(4);
arc->Draw();
}
void feynman()
{
//Draw Feynman diagrams
// To see the output of this macro, click begin_html <a href="gif/feynman.gif">here</a>. end_html
//Author: Otto Schaile
TCanvas *c1 = new TCanvas("c1", "A canvas", 10,10, 600, 300);
c1->Range(0, 0, 140, 60);
Int_t linsav = gStyle->GetLineWidth();
gStyle->SetLineWidth(3);
TLatex t;
t.SetTextAlign(22);
t.SetTextSize(0.1);
TLine * l;
l = new TLine(10, 10, 30, 30); l->Draw();
l = new TLine(10, 50, 30, 30); l->Draw();
TCurlyArc *ginit = new TCurlyArc(30, 30, 12.5*sqrt(2), 135, 225);
ginit->SetWavy();
ginit->Draw();
t.DrawLatex(7,6,"e^{-}");
t.DrawLatex(7,55,"e^{+}");
t.DrawLatex(7,30,"#gamma");
TCurlyLine *gamma = new TCurlyLine(30, 30, 55, 30);
gamma->SetWavy();
gamma->Draw();
t.DrawLatex(42.5,37.7,"#gamma");
TArc *a = new TArc(70, 30, 15);
a->Draw();
t.DrawLatex(55, 45,"#bar{q}");
t.DrawLatex(85, 15,"q");
TCurlyLine *gluon = new TCurlyLine(70, 45, 70, 15);
gluon->Draw();
t.DrawLatex(77.5,30,"g");
TCurlyLine *z0 = new TCurlyLine(85, 30, 110, 30);
z0->SetWavy();
z0->Draw();
t.DrawLatex(100, 37.5,"Z^{0}");
l = new TLine(110, 30, 130, 10); l->Draw();
l = new TLine(110, 30, 130, 50); l->Draw();
TCurlyArc *gluon1 = new TCurlyArc(110, 30, 12.5*sqrt(2), 315, 45);
gluon1->Draw();
t.DrawLatex(135,6,"#bar{q}");
t.DrawLatex(135,55,"q");
t.DrawLatex(135,30,"g");
c1->Update();
gStyle->SetLineWidth(linsav);
}
void much_draw_digis(
TString mcFileName = "data/mc.root",
TString digiFileName = "data/much_digi_sector.root",
TString rcFileName = "data/hits.root",
Int_t iEvent = 0,
Int_t iStationSelected = 0,
Int_t iLayerSelected = 2,
Int_t iSideSelected = 0, // 0 - front, 1 - back, 2 - both
Double_t xmin = -250,
Double_t xmax = 250,
Double_t ymin = -250,
Double_t ymax = 250
){
TString paramDir = gSystem->Getenv("VMCWORKDIR");
TString digiFileName = paramDir+"/parameters/much/much_v12c.digi.root";
gROOT->LoadMacro("$VMCWORKDIR/gconfig/basiclibs.C");
basiclibs();
gROOT->LoadMacro("$VMCWORKDIR/macro/much/muchlibs.C");
muchlibs();
// init digi scheme
TFile* digiFile = new TFile(digiFileName);
TObjArray* stations = (TObjArray*) digiFile->Get("stations");
CbmMuchGeoScheme* digiScheme = CbmMuchGeoScheme::Instance();
digiScheme->Init(stations);
// get TClonesArrays from trees
TFile* mcFile = new TFile(mcFileName);
TFile* rcFile = new TFile(rcFileName);
TTree* mcTree = mcFile ? (TTree*) mcFile->Get("cbmsim") : 0;
TTree* rcTree = rcFile ? (TTree*) rcFile->Get("cbmsim") : 0;
TClonesArray* points = new TClonesArray("CbmMuchPoint");
TClonesArray* digis = new TClonesArray("CbmMuchDigi");
TClonesArray* hits = new TClonesArray("CbmMuchPixelHit");
if (mcTree) mcTree->SetBranchAddress("MuchPoint",&points);
if (rcTree) rcTree->SetBranchAddress("MuchDigi",&digis);
if (rcTree) rcTree->SetBranchAddress("MuchPixelHit",&hits);
if (mcTree) mcTree->GetEntry(iEvent);
if (rcTree) rcTree->GetEntry(iEvent);
// Draw pads
TCanvas* c1 = new TCanvas("station","station",1000*(xmax-xmin)/(ymax-ymin),1000);
c1->Range(xmin,ymin,xmax,ymax);
for (Int_t iSide=1;iSide>=0;iSide--){
if (iSideSelected!=2 && iSide!=iSideSelected)continue;
CbmMuchLayerSide* side = digiScheme->GetLayerSide(iStationSelected,iLayerSelected,iSide);
for (Int_t iModule=0;iModule<side->GetNModules();++iModule) {
CbmMuchModuleGem* module = (CbmMuchModuleGem*) side->GetModule(iModule);
if (!module) continue;
module->Draw();
printf("%i\n",module->GetNPads());
}
}
return;
// Mark fired pads
for (Int_t i=0;i<digis->GetEntriesFast();i++){
CbmMuchDigi* digi = (CbmMuchDigi*) digis->At(i);
// Filter out points
Int_t detId = digi->GetDetectorId();
if (!IsSelected(detId,iStationSelected,iLayerSelected,iSideSelected)) continue;
CbmMuchModuleGem* module = (CbmMuchModuleGem*)digiScheme->GetModuleByDetId(detId);
if (!module) continue;
module->SetPadFired(digi->GetChannelId(),i,digi->GetADCCharge());
}
// Draw points
for (Int_t i=0;i<points->GetEntriesFast();i++){
CbmMuchPoint* point = (CbmMuchPoint*) points->At(i);
Int_t detId = point->GetDetectorId();
if (!IsSelected(detId,iStationSelected,iLayerSelected,iSideSelected)) continue;
TLine* l = new TLine(point->GetXIn()-0.1,point->GetYIn()-0.1,point->GetXOut()+0.1,point->GetYOut()+0.1);
l->SetLineColor(kBlack);
l->SetLineWidth(3);
l->Draw();
}
// Draw hits
for (Int_t i=0;i<hits->GetEntriesFast();i++){
CbmMuchPixelHit* hit = (CbmMuchPixelHit*) hits->At(i);
Int_t detId = hit->GetDetectorId();
if (!IsSelected(detId,iStationSelected,iLayerSelected,iSideSelected)) continue;
TEllipse* p = new TEllipse(hit->GetX(),hit->GetY(),0.08);
p->SetFillColor(kRed);
p->SetLineColor(kRed);
p->Draw();
}
// Draw a hole
TArc* holeArc = new TArc(0.,0.,digiScheme->GetStation(iStationSelected)->GetRmin());
holeArc->Draw();
c1->Print("station.png");
}
void makegraph_xyhits_mchamp1000(){
//bool save_plots = false;
bool save_plots = true;
TCanvas* canvas = new TCanvas("c1","c1",10,10,700,550);
//canvas_style(canvas);
//TH2* h1=new TH2F("h1","",2000,0,2000,2000,-1000,1000);
TH2* h1=new TH2F("h1","",1000,-1000,0,1000,0,1000);
h1->SetStats(kFALSE);
h1->SetTitle(";x [cm];y [cm]");
//h2_style(h1,3,1,1,1001,50,-1111.,-1111.,510,510,20,1,1.4,0);
const Int_t n_hits = 20;
Float_t x[n_hits] = {-522.992,
-524.292,
-525.592,
-526.892,
-606.525,
-607.825,
-609.124,
-610.424,
-630.144,
-631.444,
-632.744,
-634.044,
-741.681,
-743.086,
-744.378,
-745.665,
-765.758,
-767.126,
-768.413,
-769.755};
Float_t y[n_hits] = {82.024,
82.388,
82.661,
82.971,
101.400,
101.678,
101.929,
102.318,
106.826,
107.214,
107.421,
107.769,
132.755,
132.924,
133.286,
133.657,
138.406,
138.637,
139.007,
139.285};
graph = new TGraph(n_hits, x, y);
//gr_style(graph,1,1,1,1001,50,-1111,-1111,510,510,20,1,1.3,1);
graph->SetMarkerStyle(20);
graph->SetMarkerSize(1);
graph->SetMarkerColor(1);
graph->SetTitle(";x [cm];y [cm]");
//graph->GetYaxis()->SetRangeUser(0,20);
//Fit a circle to the graph points
TVirtualFitter::SetDefaultFitter("Minuit"); //default is Minuit
TVirtualFitter *fitter = TVirtualFitter::Fitter(0, 3);
Int_t a,c;
Double_t b,f,par;
fitter->SetFCN(myfcn);
fitter->SetParameter(0, "x0", 0, 0.1, -1000, 1000);
fitter->SetParameter(1, "y0", 1000, 0.1, 0, 2000);
fitter->SetParameter(2, "R", 1000, 0.1, 0, 1000);
Double_t arglist[1] = {0};
fitter->ExecuteCommand("MIGRAD", arglist, 0);
//Draw the circle on top of the points
TArc *arc = new TArc(fitter->GetParameter(0),
fitter->GetParameter(1),fitter->GetParameter(2));
arc->SetLineColor(kRed);
arc->SetLineWidth(4);
Leg1 = new TLegend(0.45,0.75,0.75,0.85);
//Leg1->AddEntry(graph_noChaCut,"Average Before TS","p");
Leg1->AddEntry(graph,"After TS","p");
//Leg1->AddEntry(graph_predicted,"Predicted After TS","p");
Leg1->SetBorderSize(0);
Leg1->SetTextSize(0.04);
Leg1->SetFillColor(0);
//TPaveLabel *text1 = new TPaveLabel(.17,.85,.37,.89,"CMS Preliminary #sqrt{s}=8 TeV","NDC");
//TPaveLabel *text1 = new TPaveLabel(.17,.85,.37,.89,"CMS Preliminary #sqrt{s}=8 TeV 3.4 fb^{-1}","NDC");
//TPaveLabel *text1 = new TPaveLabel(.17,.85,.37,.89,"CMS Preliminary #sqrt{s}=8 TeV 4.4 fb^{-1}","NDC");
TPaveLabel *text1 = new TPaveLabel(.17,.85,.37,.89,"CMS Preliminary #sqrt{s}=8 TeV","NDC");
text1->SetBorderSize(0);
text1->SetTextSize(0.7);
text1->SetFillColor(0);
TPaveLabel *text2 = new TPaveLabel(.17,.85,.37,.89,"1000 GeV H++, Event 58654","NDC");
text2->SetBorderSize(0);
text2->SetTextSize(0.7);
text2->SetFillColor(0);
TPaveText* text1a = new TPaveText(-500,500,-300,700);
text1a->SetBorderSize(0);
text1a->SetTextSize(0.05);
text1a->SetFillColor(0);
double p0 = fitter->GetParameter(0);
double p1 = fitter->GetParameter(1);
double p2 = fitter->GetParameter(2);
double e0 = fitter->GetParError(0);
double e1 = fitter->GetParError(1);
double e2 = fitter->GetParError(2);
char p0name[50], p1name[50], p2name[50];
sprintf(p0name,"x0 = %.2f #pm %.2f",p0,e0);
sprintf(p1name,"y0 = %.2f #pm %.2f",p1,e1);
sprintf(p2name,"R = %.2f #pm %.2f",p2,e2);
text1a->AddText(p0name);
text1a->AddText(p1name);
text1a->AddText(p2name);
canvas->cd();
h1->Draw();
arc->Draw("same");
graph->Draw("Psame");
//text1->Draw();
text1a->Draw();
text2->Draw();
//Leg1->Draw();
if(save_plots) canvas->SaveAs("../plots/hits_xy_mchamp1000.eps");
//return 0;
}