2 * @file DrawELossPoisson.C
3 * @author Christian Holm Christensen <cholm@dalsgaard.hehi.nbi.dk>
4 * @date Thu Jul 7 10:24:58 2011
6 * @brief A script to draw the Poisson vs Energy Loss correlation
9 * @deprecated Use QATrender instead
10 * @ingroup pwglf_forward_scripts_qa
26 # include <TLinearFitter.h>
33 * Draw the poisson @f$N_{ch}@f$ estimate against the @f$\Delta@f$
34 * @f$N_{ch}@f$ estimate and do a regression line between the two
42 * @return The regression coefficient
44 * @deprecated Use QATrender instead
45 * @ingroup pwglf_forward_scripts_qa
48 DrawRingELossPoisson(TList* p, UShort_t d, Char_t r,
49 Double_t xmin, Double_t xmax)
53 TList* ring = static_cast<TList*>(p->FindObject(Form("FMD%d%c",d,r)));
55 Error("DrawELossPoisson", "List FMD%d%c not found in %s",d,r,p->GetName());
59 TH2* corr = static_cast<TH2D*>(ring->FindObject("elossVsPoisson"));
61 Error("DrawRingELossPoisson", "Histogram esdEloss not found in FMD%d%c",
65 TPad* pad = static_cast<TPad*>(gPad);
70 pad->SetPad(pad->GetXlowNDC(), pad->GetYlowNDC(), .99,
71 pad->GetYlowNDC()+pad->GetHNDC());
72 pad->SetRightMargin(0.15);
75 if (xmax < 0) xmax = corr->GetXaxis()->GetXmax();
76 corr->GetXaxis()->SetRangeUser(xmin,xmax);
77 corr->GetYaxis()->SetRangeUser(xmin,xmax);
78 corr->SetTitle(Form("FMD%d%c",d,r));
79 // Info("", "Entries: %d, integral: %f",
80 // int(corr->GetEntries()), corr->Integral());
82 if (corr->GetEntries() <= 0) return 0;
84 // Calculate the linear regression
85 // Double_t dx = (xmax-xmin);
86 Double_t rxy = corr->GetCorrelationFactor();
87 Double_t sx = corr->GetRMS(1);
88 Double_t sy = corr->GetRMS(2);
91 Double_t cxy = corr->GetCovariance();
92 Double_t mx = corr->GetMean(1);
93 Double_t my = corr->GetMean(2);
96 Double_t beta = rxy * sy / sx;
98 if (TMath::Abs(cxy) < 1e-6) return 0;
99 Double_t beta = ((sy2 - delta*sx2 +
100 TMath::Sqrt(TMath::Power(sy2-delta*sx2,2) +
104 Double_t alpha = my - beta * mx;
105 TF1* f = new TF1("f", "[0]+[1]*x", xmin, xmax);
106 f->SetParameters(alpha, beta);
111 TLine* l = new TLine(xmin,xmin,xmax,xmax);
114 l->SetLineColor(kBlack);
116 // corr->GetXaxis()->SetRangeUser(0, 2);
119 Info("", "FMD%d%c correlation coefficient: %9.5f%% "
120 "line y = %f + %f * x", d, r, 100*rxy, alpha, beta);
123 Double_t x = pad->GetLeftMargin()+.01;
124 Double_t y = 1-pad->GetTopMargin()-.01;
125 TLatex* ltx = new TLatex(x, y, Form("FMD%d%c", d, r));
127 ltx->SetTextAlign(13);
128 ltx->SetTextSize(0.08);
131 ltx->SetTextSize(0.06);
132 ltx->DrawLatex(x,y,"Deming regression: y=#alpha+#beta x");
135 ltx->SetTextSize(0.05);
136 ltx->DrawLatex(x, y, Form("#alpha=%5.3f", alpha));
138 ltx->DrawLatex(x, y, Form("#beta= %5.3f", beta));
140 TLinearFitter* fitter = new TLinearFitter(1);
141 fitter->SetFormula("1 ++ x");
142 for (Int_t i = 1; i <= corr->GetNbinsX(); i++) {
143 x = corr->GetXaxis()->GetBinCenter(i);
144 if (x < xmin || x > xmax) continue;
145 for (Int_t j = 1; j <= corr->GetNbinsY(); j++) {
146 y = corr->GetYaxis()->GetBinCenter(j);
147 if (y < xmin || y > xmax) continue;
148 Double_t c = corr->GetBinContent(i,j);
149 if (c < .1) continue;
150 fitter->AddPoint(&x, y, c);
153 Bool_t robust = false;
155 fitter->EvalRobust();
159 for (Int_t i = 0; i < 2; i++) {
160 std::cout << i << "\t"
161 << fitter->GetParName(i) << "\t"
162 << fitter->GetParameter(i) << "\t";
164 std::cout << fitter->GetParError(i);
165 std::cout << std::endl;
167 Double_t chi2 = fitter->GetChisquare();
168 Int_t ndf = (fitter->GetNpoints() -
169 fitter->GetNumberFreeParameters() );
170 std::cout << "chi2/ndf: " << chi2 << '/' << ndf
171 << '=' << chi2 / ndf << std::endl;
174 // corr->Scale(1. / corr->GetMaximum());
176 return corr->GetCorrelationFactor();
180 * Draw the correlation between the Poisson @f$N_{ch}@f$ estimate
181 * and the @f$\Delta@f$ @f$N_{ch}@f$ estimate and do a regression
182 * line between the two for each ring
184 * @param filename File to read
185 * @param xmax Minimum X
186 * @param xmin Maximum X
188 * @deprecated Use QATrender instead
189 * @ingroup pwglf_forward_scripts_qa
192 DrawELossPoisson(const char* filename="forward.root",
193 const char* folder="ForwardResults",
197 gStyle->SetPalette(1);
198 gStyle->SetOptFit(0);
199 gStyle->SetOptStat(0);
200 gStyle->SetOptTitle(0);
201 gStyle->SetTitleW(.4);
202 gStyle->SetTitleH(.1);
203 gStyle->SetTitleX(.4);
204 // gStyle->SetTitleY(.1);
205 gStyle->SetTitleColor(0);
206 gStyle->SetTitleStyle(0);
207 gStyle->SetTitleBorderSize(0);
209 TFile* file = TFile::Open(filename, "READ");
211 Error("DrawELossPoisson", "failed to open %s", filename);
215 TList* forward = static_cast<TList*>(file->Get(folder));
217 Error("DrawELossPoisson", "List %s not found in %s", folder, filename);
221 TList* dc = static_cast<TList*>(forward->FindObject("fmdDensityCalculator"));
223 Error("DrawELossPoisson", "List fmdDensityCalculator not found in Forward");
227 TCanvas* c = new TCanvas("elossVsPoisson",
228 "N_ch from ELoss versus from Poisson", 900, 700);
232 c->SetHighLightColor(0);
233 c->Divide(3, 2, 0, 0);
236 c->cd(1); corrs[0] = DrawRingELossPoisson(dc, 1, 'I', xmin, xmax);
237 c->cd(2); corrs[1] = DrawRingELossPoisson(dc, 2, 'I', xmin, xmax);
238 c->cd(5); corrs[2] = DrawRingELossPoisson(dc, 2, 'O', xmin, xmax);
239 c->cd(3); corrs[3] = DrawRingELossPoisson(dc, 3, 'I', xmin, xmax);
240 c->cd(6); corrs[4] = DrawRingELossPoisson(dc, 3, 'O', xmin, xmax);
242 TVirtualPad* p = c->cd(4);
243 p->SetTopMargin(0.05);
244 p->SetRightMargin(0.10);
245 p->SetLeftMargin(0.15);
246 p->SetBottomMargin(0.15);
249 TH1D* hc = new TH1D("corrs", "Correlation factors", 5, .5, 5.5);
250 hc->SetFillColor(kRed+1);
251 hc->SetFillStyle(3001);
254 hc->GetXaxis()->SetBinLabel(1,"FMD1i"); hc->SetBinContent(1,corrs[0]);
255 hc->GetXaxis()->SetBinLabel(2,"FMD2i"); hc->SetBinContent(2,corrs[1]);
256 hc->GetXaxis()->SetBinLabel(3,"FMD2o"); hc->SetBinContent(3,corrs[2]);
257 hc->GetXaxis()->SetBinLabel(4,"FMD3i"); hc->SetBinContent(4,corrs[3]);
258 hc->GetXaxis()->SetBinLabel(5,"FMD3o"); hc->SetBinContent(5,corrs[4]);
259 hc->GetXaxis()->SetLabelSize(0.08);
260 hc->GetYaxis()->SetTitle("r");
261 hc->SetMarkerSize(1.5);
262 hc->Draw("text hist");
264 // TH2D* highCuts = static_cast<TH2D*>(dc->FindObject("highCuts"));
265 // if (highCuts) highCuts->Draw("colz");
267 c->SaveAs("elossVsPoisson.png");