SimpleCorrect.C

Go to the documentation of this file.

#ifndef __CINT__
# include <TCanvas.h>
# include <TList.h>
# include <TH1.h>
# include <TH2.h>
# include <THStack.h>
# include <TFile.h>
# include <TError.h>
# include <TLatex.h>
# include <TFitResult.h>
# include <TF1.h>
# include <TMath.h>
# include <THashList.h>
# include <TParameter.h>
#else
class TList;
class TSeqCollection;
class TH1;
class TH2;
class THStack;
class TAxis;
class TDirectory;
#endif

class TCanvas; // Auto load 

const Bool_t kSimpleCorrectLoaded = true;

const char* dndetaTitle = "d#it{N}_{ch}/d#it{#eta}";
const Color_t cc[] = { kMagenta+2,
           kBlue+2,
           kAzure-1, // 10,
           kCyan+2,
           kGreen+1,
           kSpring+5,//+10,
           kYellow+1,
           kOrange+5,//+10,
           kRed+1,
           kPink+5,//+10,
           kBlack };

//====================================================================
TObject* GetO(TSeqCollection* l, const char* name, TClass* cls)
{
  if (!l) {
    Warning("GetO", "No list passed");
    return 0;
  }
  TObject* o = l->FindObject(name);
  if (!o) {
    Warning("GetO", "No object named %s found in list %s",
      name, l->GetName());
    return 0;
  }
  if (!cls) return o;

  if (!o->IsA()->InheritsFrom(cls)) {
    Warning("GetO", "Object %s read from %s is not a %s but a %s",
      name, l->GetName(), cls->GetName(), o->ClassName());
    return 0;
  }
  return o;
}
//____________________________________________________________________
TObject* CopyO(TSeqCollection* l, const char* name, const char* newName,
         TClass* cls)
{
  TObject* orig = GetO(l, name, cls);
  if (!orig) return 0;
  TObject* copy = orig->Clone(newName ? newName : name);
  return copy;
}
//____________________________________________________________________
TH1* GetH1(TSeqCollection* l, const char* name)
{
  return static_cast<TH1*>(GetO(l,name,TH1::Class()));
}
//____________________________________________________________________
TH2* GetH2(TSeqCollection* l, const char* name)
{
  return static_cast<TH2*>(GetO(l,name,TH2::Class()));
}
//____________________________________________________________________
TH1* CopyH1(TSeqCollection* l, const char* name, const char* newName=0)
{
  TH1* copy = static_cast<TH1*>(CopyO(l,name,newName,TH1::Class()));
  if (copy) copy->SetDirectory(0);
  return copy;
}
//____________________________________________________________________
TH2* CopyH2(TSeqCollection* l, const char* name, const char* newName=0)
{
  TH2* copy = static_cast<TH2*>(CopyO(l,name,newName,TH2::Class()));
  if (copy) copy->SetDirectory(0);
  return copy;
}
/* @} */

//====================================================================
Bool_t CheckAxisNBins(const char*  which,
          const TAxis* a1,
          const TAxis* a2)
{
  if (a1->GetNbins() != a2->GetNbins()) {
    ::Warning("CheckAxisNBins", "Incompatible number %s bins: %d vs %d",
        which, a1->GetNbins(), a2->GetNbins());
    return false;
  }
  return true;
}
//____________________________________________________________________
Bool_t CheckAxisLimits(const char*  which,
           const TAxis* a1,
           const TAxis* a2)
{
  if (!TMath::AreEqualRel(a1->GetXmin(), a2->GetXmin(),1.E-12) ||
      !TMath::AreEqualRel(a1->GetXmax(), a2->GetXmax(),1.E-12)) {
    Warning("CheckAxisLimits",
      "Limits of %s axis incompatible [%f,%f] vs [%f,%f]", which,
      a1->GetXmin(), a1->GetXmax(), a2->GetXmin(), a2->GetXmax());
    return false;
  }
  return true;
}
//____________________________________________________________________
Bool_t CheckAxisBins(const char*  which,
         const TAxis* a1,
         const TAxis* a2)
{
  const TArrayD * h1Array = a1->GetXbins();
  const TArrayD * h2Array = a2->GetXbins();
  Int_t fN = h1Array->fN;
  if ( fN == 0 ) return true;
  if (h2Array->fN != fN) {
    // Redundant?
    Warning("CheckAxisBins", "Not equal number of %s bin limits: %d vs %d",
      which, fN, h2Array->fN);
    return false;
  }
  else {
    for (int i = 0; i < fN; ++i) {
      if (!TMath::AreEqualRel(h1Array->GetAt(i),h2Array->GetAt(i),1E-10)) {
  Warning("CheckAxisBins",
    "%s limit # %3d incompatible: %f vs %f",
    which, i, h1Array->GetAt(i),h2Array->GetAt(i));
  return false;
      }
    }
  }
  return true;
}
//____________________________________________________________________
Bool_t CheckAxisLabels(const char*  which,
           const TAxis* a1,
           const TAxis* a2)
{
  // check that axis have same labels
  THashList *l1 = (const_cast<TAxis*>(a1))->GetLabels();
  THashList *l2 = (const_cast<TAxis*>(a2))->GetLabels();
  
  if (!l1 && !l2) return true;
  if (!l1 ||  !l2) {
    Warning("CheckAxisLabels", "Difference in %s labels: %p vs %p",
      which, l1, l2);
    return false;
  }
  // check now labels sizes  are the same
  if (l1->GetSize() != l2->GetSize()) {
    Warning("CheckAxisLabels", "Different number of %s labels: %d vs %d",
      which, l1->GetSize(), l2->GetSize());
    return false;
  }
  for (int i = 1; i <= a1->GetNbins(); ++i) {
    TString label1 = a1->GetBinLabel(i);
    TString label2 = a2->GetBinLabel(i);
    if (label1 != label2) {
      Warning("CheckAxisLabels", "%s label # %d not the same: '%s' vs '%s'",
        which, i, label1.Data(), label2.Data());
      return false;
    }
  }
    
  return true;
}
//____________________________________________________________________
Bool_t CheckAxis(const char*  which, 
     const TAxis* a1,
     const TAxis* a2,
     Bool_t       alsoLbls)
{
  if (!CheckAxisNBins (which, a1, a2)) return false;
  if (!CheckAxisLimits(which, a1, a2)) return false;
  if (!CheckAxisBins  (which, a1, a2)) return false;
  if (alsoLbls && !CheckAxisLabels(which, a1, a2)) return false;
  return true;
}
//____________________________________________________________________
Bool_t CheckConsistency(const TH1* h1, const TH1* h2)
{
  // Check histogram compatibility
  if (h1 == h2) return true;

  if (h1->GetDimension() != h2->GetDimension()) {
    Warning("CheckConsistency",
      "%s and %s have different dimensions %d vs %d",
      h1->GetName(), h2->GetName(),
      h1->GetDimension(), h2->GetDimension());
    return false;
  }
  Int_t dim = h1->GetDimension(); 
    
  Bool_t ret = true;
  Bool_t alsoLbls = (h1->GetEntries() != 0 && h2->GetEntries() != 0);
  if (!CheckAxis("X", h1->GetXaxis(), h2->GetXaxis(), alsoLbls)) ret = false;
  if (dim > 1 &&
      !CheckAxis("Y", h1->GetYaxis(), h2->GetYaxis(), alsoLbls)) ret = false;
  if (dim > 2 &&
      !CheckAxis("Z", h1->GetZaxis(), h2->GetZaxis(), alsoLbls)) ret = false;
    
  return ret;
}

//____________________________________________________________________
TH1* Coerce(const TH1* templ, TH1* src)
{
  if (CheckConsistency(templ, src)) return src;
  TH1* ret = static_cast<TH1*>(templ->Clone(src->GetName()));
  ret->SetDirectory(0);
  ret->Reset();
  for (Int_t i = 1; i <= ret->GetNbinsX(); i++) {
    Double_t x = ret->GetXaxis()->GetBinCenter(i);
    Int_t    b = src->GetXaxis()->FindBin(x);
    if (b <= 0 || b >= src->GetNbinsX()) continue;
    Double_t c = src->GetBinContent(b);
    Double_t e = src->GetBinError(b);
    ret->SetBinContent(i, c);
    ret->SetBinError  (i, e);
  }
  return ret;
}

//____________________________________________________________________
TH2* Coerce(const TH2* templ, TH2* src)
{
  if (CheckConsistency(templ, src)) return src;
  TH2* ret = static_cast<TH2*>(templ->Clone(src->GetName()));
  ret->SetDirectory(0);
  ret->Reset();
  for (Int_t i = 1; i <= ret->GetNbinsX(); i++) {
    Double_t x  = ret->GetXaxis()->GetBinCenter(i);
    Int_t    bx = src->GetXaxis()->FindBin(x);
    if (bx <= 0 || bx >= src->GetNbinsX()) continue;
    for (Int_t j = 1; j <= ret->GetNbinsY(); j++) {
      Double_t y  = ret->GetYaxis()->GetBinCenter(j);
      Int_t    by = src->GetYaxis()->FindBin(y);
      Double_t c  = src->GetBinContent(bx,by);
      Double_t e  = src->GetBinError(bx,by);
      ret->SetBinContent(i, j, c);
      ret->SetBinError  (i, j, e);
    }
  }
  return ret;
}
/* @} */

//====================================================================
TH1* SetAttr(TH1* h,
       Color_t  color,
       Style_t  marker=20,
       Double_t size=1.,
       Style_t  fill=0,
       Style_t  line=1,
       Width_t  width=1)
{
  if (!h) return 0;
  h->SetMarkerColor(color);
  h->SetMarkerStyle(marker);
  h->SetMarkerSize(size);
  h->SetFillColor(color);
  h->SetFillStyle(fill);
  h->SetLineColor(color);
  h->SetLineStyle(line);
  h->SetLineWidth(width);
  h->GetXaxis()->SetNdivisions(210);
  h->GetYaxis()->SetNdivisions(210);
}

//____________________________________________________________________
void PrintH(TH2* h, Int_t prec=2)
{
  Printf("Content of %s - %s", h->GetName(), h->GetTitle());
  for (Int_t i = 1; i <= h->GetNbinsX(); i++) {
    printf("%3d: ", i);
    for (Int_t j = 1; j <= h->GetNbinsY(); j++) {
      Double_t c = h->GetBinContent(i,j);
      Double_t e = h->GetBinError  (i,j);
      if (TMath::IsNaN(c) || TMath::IsNaN(e))
  printf("*** NAN ***");
      else 
  printf("%.*f+/-%.*f ", prec, c, prec, e);
    }
    printf("\n");
  }
}
//____________________________________________________________________
void PrintH(TH1* h, Int_t prec=2)
{
  Printf("Content of %s - %s", h->GetName(), h->GetTitle());
  for (Int_t i = 1; i <= h->GetNbinsX(); i++) {
    if (h->GetBinContent(i) <= 1e-6) continue;
    printf("%3d (%+6.3f): %.*f+/-%.*f\n", i,
     h->GetXaxis()->GetBinCenter(i),
     prec, h->GetBinContent(i),
     prec, h->GetBinError(i));
  }
}
/* @} */
//====================================================================
Double_t Integrate(TH1*      h,
       Double_t  min,
       Double_t  max,
       Double_t& err)
{
  const Double_t epsilon = 1e-6;
  Int_t bMin = h->FindBin(min+epsilon);
  Int_t bMax = h->FindBin(max-epsilon);
  if (bMin < 1) bMin = 0; // Include underflow bin
  Double_t val = h->IntegralAndError(bMin, bMax, err);
  // For a-symmetric histograms, return 
  if (TMath::Abs(h->GetXaxis()->GetXmin()+h->GetXaxis()->GetXmax())>=epsilon)
    return val;

  // Otherwise, also integrate negative side
  Double_t err2;
  bMin =  h->FindBin(-min+epsilon);
  bMax =  h->FindBin(-max-epsilon);
  val  += h->IntegralAndError(bMin, bMax, err2);
  err  =  TMath::Sqrt(err*err+err2*err2);
  return val;
}
//____________________________________________________________________
Double_t RatioE(Double_t n, Double_t en,
    Double_t d, Double_t ed,
    Double_t& er)
{
  Double_t r = 0;
  er = 0;
  if (TMath::Abs(n) < 1e-16 || TMath::Abs(d) < 1e-16) return 0;
  r  = n/d;
  er = TMath::Sqrt(en*en/n/n + ed*ed/d/d);
  return r;
}
/* @} */

//====================================================================
//____________________________________________________________________
TH2* Scale(TH2* h, TH1* g)
{
  for (Int_t i = 1; i <= h->GetNbinsX(); i++) {
    Double_t dc = g->GetBinContent(i);
    Double_t de = g->GetBinError  (i);
    Double_t dr = (dc > 1e-6 ? 1/dc : 0);
    Double_t dq = dr * de;
    for (Int_t j = 1; j <= h->GetNbinsY(); j++) {
      Double_t nc  = h->GetBinContent(i,j);
      Double_t ne  = h->GetBinError  (i,j);
      Double_t ns  = (nc > 0 ? ne/nc : 0);
      Double_t sc  = dc * nc;
      Double_t se  = sc*TMath::Sqrt(ns*ns+dq*dq);
      // Printf("Setting bin %2d,%2d to %f +/- %f", sc, se);
      h->SetBinContent(i,j,sc);
      h->SetBinError  (i,j,se);
    }
  }
  return h;
}
//____________________________________________________________________
TH1* Scale(TH1* h, Double_t s, Double_t se)
{
  Double_t rr    = se/s;
  for (Int_t i = 1; i <= h->GetNbinsX(); i++) {
    Double_t c  = h->GetBinContent(i);
    Double_t e  = h->GetBinError  (i);
    Double_t es = (c > 0 ? e/c : 0);
    Double_t sc = s * c;
    Double_t se = sc*TMath::Sqrt(es*es+rr*rr);
    // Printf("Setting bin %2d,%2d to %f +/- %f", sc, se);
    h->SetBinContent(i,sc);
    h->SetBinError  (i,se);
  }
  return h;
}

//____________________________________________________________________
TH2* Scale(TH2* h, Double_t s, Double_t se)
{
  Double_t rr    = se/s;
  for (Int_t i = 1; i <= h->GetNbinsX(); i++) {
    for (Int_t j = 1; j <= h->GetNbinsY(); j++) {
      Double_t c  = h->GetBinContent(i,j);
      Double_t e  = h->GetBinError  (i,j);
      Double_t es = (c > 0 ? e/c : 0);
      Double_t sc = s * c;
      Double_t se = sc*TMath::Sqrt(es*es+rr*rr);
      // Printf("Setting bin %2d,%2d to %f +/- %f", sc, se);
      h->SetBinContent(i,j,sc);
      h->SetBinError  (i,j,se);
    }
  }
  return h;
}
TH2* CorrectForIPz(TH2* in, TH1* ipz, Bool_t full=true)
{
  // Printf("Scaling to IP of %s", in->GetName());
  for (Int_t iy = 1; iy <= in->GetNbinsY(); iy++) {
    Double_t z   = in->GetYaxis()->GetBinCenter(iy);
    Int_t    bin = ipz->GetXaxis()->FindBin(z);
    Double_t nEv = ipz->GetBinContent(bin);
    Double_t eEv = ipz->GetBinError  (bin);
    Double_t esc = (nEv > 0 ? 1./nEv : 0);
    Double_t rE2 = esc*esc*eEv*eEv;
    // Printf("z=%f -> %f +/- %f events", z, nEv, eEv);
    for (Int_t ix = 1; ix <= in->GetNbinsX(); ix++) {
      Double_t c   = in->GetBinContent(ix,iy);
      Double_t e   = in->GetBinError  (ix,iy);
      Double_t r   = (c > 0 ? e/c : 0);
      // Scale by number of events, and error propagate 
      Double_t sc  = c * esc;
      Double_t se  = 0;
      if (full)se  = sc * TMath::Sqrt(r*r+rE2);
      else     se  = e * esc;
      Double_t scl = 1 / in->GetXaxis()->GetBinWidth(ix);
      // Printf("Setting bin (%3d,%3d) to %f +/- %f (%f %5.1f%% %5.1f%%)",
      //        ix,iy,scl*sc, scl*se, scl, 100*r, 100*esc*eEv);
      in->SetBinContent(ix, iy, scl*sc);
      in->SetBinError  (ix, iy, scl*se);
    }
  }
  return in;
}

//____________________________________________________________________
TH1* Avg(TH2*        h,
   TH1*        ipz,
   UShort_t    mode, 
   const char* name,
   TH2*        other=0) 
{
  if (!h) return 0;
  TH2* mask = other ? other : h;
  // Printf("Averaging %s - %s (%p) %s", h->GetName(), h->GetTitle(),
  //        ipz, (mode  ? "errors only" : "full scale"));
  Int_t nIPz = h->GetNbinsY();
  Int_t nEta = h->GetNbinsX();
  TH1*  p    = h->ProjectionX(name,1,nIPz,"e");
  p->SetDirectory(0);
  p->SetFillColor(0);
  p->SetFillStyle(0);
  p->SetYTitle(Form("#LT(%s)#GT", h->GetYaxis()->GetTitle()));
  p->Reset();
  for (Int_t etaBin = 1; etaBin <= nEta; etaBin++) {
    TArrayD hv(nIPz);
    TArrayD he(nIPz);
    TArrayD hr(nIPz);
    TArrayI hb(nIPz);
    Int_t   j = 0;
    for (Int_t ipzBin = 1; ipzBin <= nIPz; ipzBin++) {
      Double_t bc = mask->GetBinContent(etaBin, ipzBin);
      if (bc < 1e-9) continue; // Low value
      Double_t be = mask->GetBinError  (etaBin, ipzBin);
      if (TMath::IsNaN(be)) continue; // Bad error value
      hv[j] = bc;
      he[j] = be;
      hr[j] = be/bc;
      hb[j] = ipzBin;
      j++;    
    }
    // Now we have all interesting values.  Sort the relative error
    // array to get the most significant first.
    TArrayI idx(nIPz);
    TMath::Sort(j, hr.fArray, idx.fArray, false);
    Double_t nsum  = 0; // Running weighted sum
    Double_t nsume = 0; // Running weighted sum error
    Double_t dsum  = 0;
    Double_t dsume = 0;
    Int_t    n     = 0;
    Double_t rat   = 1e99;
    
    Int_t k = 0;
    for (k = 0; k < j; k++) {
      Int_t    l      = idx[k]; // Sorted index
      Int_t    ipzBin = hb[l];
      Double_t hvv    = hv[l];      
      Double_t hee    = he[l];
      Double_t hrr    = hr[l];
      Double_t x      = TMath::Sqrt(nsume+hee*hee)/(nsum+hvv);
      if (x > rat) {
  continue; // Ignore - does not help
      }
      Double_t by = h->GetYaxis()->GetBinCenter(ipzBin);
      Int_t    ib = ipz ? ipz->FindBin(by) : 0;
      rat   =  x;
      nsum  += h->GetBinContent(etaBin, ipzBin);
      nsume += TMath::Power(h->GetBinError(etaBin, ipzBin), 2);
      // If we do not have the vertex distribution, then just count
      // number of observations. 
      dsum  += !ipz ? 1 : ipz->GetBinContent(ib);
      dsume += !ipz ? 0 : TMath::Power(ipz->GetBinError(ib),2);
      n++;
    }
    if (k == 0 || n == 0) {
      // ::Warning("Average", "Eta bin # %3d has no data",etaBin);
      continue; // This eta bin empty!
    }

    Double_t norm = (mode > 0 ? n : dsum);
    Double_t rne  = nsume/nsum/nsum;
    Double_t rde  = dsume/dsum/dsum;
    Double_t av   = nsum/norm;
    Double_t ave  = 0;
    if (mode==2) ave = TMath::Sqrt(nsume)/n;
    else         ave = av*TMath::Sqrt(rne+rde);
#if 0
    Printf("%10s - bin %3d (%+6.3f) count=%2d n=%9.3f+/-%9.3f d=%9.3f+/-%9.3f "
     "norm=%9.3f -> %9.3f +/- %9.3f",
     h->GetName(), etaBin, h->GetXaxis()->GetBinCenter(etaBin), n, 
     nsum, TMath::Sqrt(nsume)/(mode == 2 ? n : nsum),
     dsum, TMath::Sqrt(dsume)/(mode == 2 ? n : dsum),
     norm, av, ave);
#endif 
    //Info("AverageSim", "Setting eta bin # %3d to %f +/- %f", etaBin,av,ave);
    p->SetBinContent(etaBin, av);
    p->SetBinError  (etaBin, ave);
  }
  if (mode == 0) p->Scale(1, "width");
  return p;      
}
//____________________________________________________________________
TH1* Avg2(TH2* h, TH1* ipz, UShort_t mode, const char* name)
{
  TH2* tmp = static_cast<TH2*>(h->Clone("tmp"));
  tmp->SetDirectory(0);
  CorrectForIPz(tmp, ipz, true);
  
  TH1* ret = Avg(tmp, 0, 2, name);
  if (tmp) delete tmp;

  return ret;
}
/* @} */

//====================================================================
Double_t GetDeltaScale(TH1*      deltaRec,
           TH1*      deltaBg,
           Double_t& eR,
           Double_t  nEvRec=1,
           Double_t  nEvBg =1,
           Double_t  lim=1e9)
{
  if (!deltaRec || !deltaBg) {
    Error("GetDeltaScale", "Missing input histogram(s): %p %p",
    deltaRec, deltaBg);
    return 0;
  }
  deltaRec->Scale(1./nEvRec);
  deltaBg ->Scale(1./nEvBg);
  Double_t top      = TMath::Min(lim,deltaRec->GetXaxis()->GetXmax());
  Double_t eRec, eBg;
  Double_t iRec     = Integrate(deltaRec, 5, top, eRec);
  Double_t iBg      = Integrate(deltaBg,  5, top, eBg);
  //Printf("Integral of reconstructed Delta: %14.1f +/- %14.2f", iRec, eRec);
  //Printf("Integral of injected Delta:      %14.1f +/- %14.2f", iBg,  eBg);
  Double_t r        = RatioE(iRec, eRec, iBg, eBg, eR);
#if 0
  Printf("%20s: data=%9g+/-%9g  inj=%9g+/-%9g  ->  %9g+/-%9g",
   list->GetName(), iRec, eRec, iBg, eBg, r, eR);
#endif 
  return r;
}

//____________________________________________________________________
Double_t GetDeltaScale(TSeqCollection* list,
           Int_t           b,
           Double_t&       eR,
           Double_t        nEv=1,
           Double_t        lim=1e9)
{
  TH1*     deltaRec = CopyH1(list,Form("b%d_TrData_WDist", b));
  TH1*     deltaBg  = CopyH1(list,Form("b%d_TrInj_WDist", b));
  Double_t scale    = GetDeltaScale(deltaRec, deltaBg, eR, nEv, nEv,lim);
  delete deltaRec;
  delete deltaBg;
  return scale;
}
//____________________________________________________________________
Double_t GetDeltaScale(TSeqCollection* realList,
           TSeqCollection* simList,
           Int_t           b,
           Double_t&       eR,
           Double_t        nEvReal=1,
           Double_t        nEvSim=1,
           Double_t        lim=1e9)
{
  TH1*     deltaReal = CopyH1(realList,Form("b%d_TrData_WDist", b));
  TH1*     deltaSim  = CopyH1(simList, Form("b%d_TrData_WDist", b));
  Double_t scale     = GetDeltaScale(deltaReal,deltaSim,eR,nEvReal,nEvSim,lim);
  delete deltaReal;
  delete deltaSim;
  return scale;
}

//____________________________________________________________________
TH1* GetDeltaDist(TH2*     deltaReal,
      TH2*     deltaSim,
      Double_t nEvReal,
      Double_t nEvSim,
      Double_t lim=1e9)     
{
  Double_t top       = deltaReal->GetYaxis()->GetXmax();
  TH1*     ret       = deltaReal->ProjectionX("scalar");
  ret->Reset();
  ret->SetTitle("Background scale (#it{k})");
  ret->SetYTitle("#delta scale");
  ret->SetXTitle("#it{#eta}");
  ret->SetDirectory(0);
  for (Int_t i = 1; i <= ret->GetNbinsX(); i++) {
    TH1*     tmpReal = deltaReal->ProjectionY("tmpReal",i,i);
    TH1*     tmpSim  = deltaSim ->ProjectionY("tmpSim", i,i);
    Double_t eR, r   = GetDeltaScale(tmpReal, tmpSim, eR, nEvReal, nEvSim, lim);
    ret->SetBinContent(i, r);
    ret->SetBinError  (i, eR);
    delete tmpReal;
    delete tmpSim;
  }
  return ret;
}

//____________________________________________________________________
TH1* GetDeltaDist(TSeqCollection* list,
      Int_t           b,
      Double_t        nEv=1)
{
  TH2*     deltaRec = GetH2(list,Form("b%d_TrData_WDvsEta", b));
  TH2*     deltaBg  = GetH2(list,Form("b%d_TrInj_WDvsEta", b));
  return GetDeltaDist(deltaRec, deltaBg, nEv, nEv);
}

//____________________________________________________________________
TH1* GetDeltaDist(TSeqCollection* realList,
      TSeqCollection* simList,
      Int_t           b,
      Double_t        nEvReal,
      Double_t        nEvSim,
      Double_t        lim=1e9)
{
  TH2*     deltaReal = CopyH2(realList,Form("b%d_TrData_WDvsEta", b));
  TH2*     deltaSim  = CopyH2(simList, Form("b%d_TrData_WDvsEta", b));
  return GetDeltaDist(deltaReal, deltaSim, nEvReal, nEvSim, lim);
}
/* @} */



//====================================================================
TH2* GetBg(Bool_t          comb,
     TSeqCollection* list,
     Int_t           b,
     Double_t        nEv=1,
     Double_t        lim=1e9)
{
  Double_t eR = 0;
  TH2* in     = GetH2(list,Form("b%d_Tr%s_ZvEtaCutT",b,comb ? "Comb" : "Inj"));
  TH2* ret    = static_cast<TH2*>(in->Clone("bg"));
  in ->SetDirectory(0);
  ret->SetDirectory(0);
  ret->SetStats(0);
  if (comb) return ret;

#if 1
  // We should do the below, but that doesn't work as it creates
  // negative signals!
  Double_t r     = GetDeltaScale(list, b, eR, nEv, lim);
  // Printf("Ratio of integrals:              %14.3f +/- %f14.3", r, eR);
  return Scale(ret, r, eR);
#else
  TH1*    r      = GetDeltaDist(list, b, nEv);
  Scale(ret, r);
  // PrintH(r);
  delete r;
  // PrintH(ret);
  return ret;
#endif 
}
//____________________________________________________________________
TH2* CorrectSignal(Bool_t comb, TH2* meas, TH2* bg, TH2* simMeas)
{
  if (!comb) {
    meas->Add(bg, -1);
    return meas;
  }
  TH2* beta = static_cast<TH2*>(bg->Clone("beta"));
  beta->Divide(simMeas);
  beta->SetDirectory(0);
  TH2* one = static_cast<TH2*>(bg->Clone("one"));
  one->Reset();
  one->SetDirectory(0);
  for (Int_t i = 1; i <= one->GetNbinsX(); i++) 
    for (Int_t j = 1; j <= one->GetNbinsY(); j++)
      one->SetBinContent(i,j,1);
  one->Add(beta,-1);
  meas->Multiply(one);
  delete one;
  delete beta;    
  return meas;
}
//____________________________________________________________________
TH1* GetDelta(TSeqCollection* l,
        const char*     which,
        Int_t           b,
        Int_t           nEv, 
        Double_t        scale=0,
        Double_t        scaleE=0,
        Double_t        lim=1e9)
{
  TH1* h = CopyH1(l, Form("b%d_Tr%s_WDist", b, which));
  if (!h) return 0;
  h->Scale(1./nEv);
  h->SetYTitle("tracklets/event");
  h->SetXTitle("#Delta");

  Bool_t  isData = (scale < 1e-6);
  Color_t color  = (isData ? kGreen+2 : kBlue+2);
  TString w(which);
  if (w.EqualTo("Data")) SetAttr(h, color,      isData ? 21 : 25);
  if (w.EqualTo("Inj"))  SetAttr(h, color,      isData ? 23 : 32);
  if (w.EqualTo("Comb")) SetAttr(h, color,      26);
  if (w.EqualTo("Prim")) SetAttr(h, kMagenta+2, 28);
  if (w.EqualTo("Sec"))  SetAttr(h, kMagenta+2, 27);

  if (w.EqualTo("Data")) h->SetTitle("Measured");
  if (w.EqualTo("Inj"))  h->SetTitle("Injection");
  if (w.EqualTo("Comb")) h->SetTitle("Combinatorial");
  if (w.EqualTo("Prim")) h->SetTitle("Primaries");
  if (w.EqualTo("Sec"))  h->SetTitle("Secondaries");

  if (w.EqualTo("Inj")) {
    Double_t eR, r = GetDeltaScale(l, b, eR, 1, lim);
    Scale(h, r, eR);
    h->SetTitle(Form("%5.3f#pm%5.3f #times %s",
         r, eR, h->GetTitle()));
  }
  
  if (scale > 1e-6) {
    Scale(h, scale, scaleE);
    h->SetTitle(Form("%5.3f#pm%5.3f #times %s",
         scale, scaleE, h->GetTitle()));
  }
  return h;
}
  
  
//____________________________________________________________________
void CorrectOneBin(THStack*        stack,
       TDirectory*     dir,
       Int_t           b,
       TSeqCollection* realList,
       TSeqCollection* simList,
       Bool_t          realComb,
       Bool_t          simComb, 
       Bool_t          preScale=false,
       Bool_t          full=false,
       Bool_t          showOne=false,
       UShort_t        scaleMode=2,
       Double_t        lim=1e9)
{
  const Double_t k = (realList == simList ? 1 : 1.3);
  realList->SetName("realList");
  simList ->SetName("simList");
  TH2* realMeas = GetH2(realList, Form("b%d_TrData_ZvEtaCutT", b));
  TH2* realIPzC = GetH2(realList, "zv");
  TH1* realIPz  = realIPzC->ProjectionX("realIPz", b+1,b+1, "e");
  TH2* simMeas  = Coerce(realMeas,
       GetH2(simList,  Form("b%d_TrData_ZvEtaCutT", b)));
  TH2* simIPzC  = Coerce(realIPzC, GetH2(simList,  "zv"));
  TH1* simIPz   = simIPzC->ProjectionX("simIPz", b+1,b+1, "e");
  TH2* trueGen  = Coerce(realMeas,
       GetH2(simList,  Form("b%d_zvEtaPrimMC",      b)));
  TH2* trueIPzC = Coerce(realIPzC, GetH2(simList,  "zvMCNoPS"));
  TH1* trueIPz  = simIPzC->ProjectionX("trueIPz", b+1,b+1, "e");
  TH2* simBg    = Coerce(realMeas, GetBg(simComb,  simList, b, 1, lim));
  TH2* realBg   = Coerce(realMeas, GetBg(realComb,
           (realComb ?simList : realList),
           b, 1, lim));
  Double_t scale  = 1;
  Double_t scaleE = 0;
  TH1*     histK  = 0;
  // PrintH(simBg);
  // PrintH(realBg);
  if (realComb) {
    if      (scaleMode == 0) {
      // Fixed scale
      scale = k;
      Scale(realBg, scale, 0);
    }
    else if (scaleMode == 1) {
      // Eta indepedent scale
#if 0
      Double_t simRe, realRe;
      Double_t realR  = GetDeltaScale(realList, b, realRe,
              realIPz->GetEntries(), lim);
      Double_t simR   = GetDeltaScale(simList,  b, simRe,
              simIPz->GetEntries(), lim);
      scale           = RatioE(realR, realRe, simR, simRe, scaleE);
#else
      scale           = GetDeltaScale(realList, simList, b, scaleE, 
              realIPz->GetEntries(),
              simIPz->GetEntries(),
              lim);
#endif 
      Scale(realBg, scale, scaleE);
    }
    else if (scaleMode == 2) {
#if 0
      // Eta dependent scale 
      TH1* tmpReal = GetDeltaDist(realList, b, realIPz->GetEntries(), lim);
      TH1* tmpSim  = GetDeltaDist(simList,  b, simIPz ->GetEntries(), lim);
      tmpReal->Divide(tmpSim);
      tmpReal->SetName("k");
      tmpReal->SetTitle("Background scale");
      tmpReal->SetMarkerColor(tmpReal->GetMarkerColor());
      tmpReal->SetMarkerStyle(tmpReal->GetMarkerStyle()+4);
      tmpReal->SetLineColor(tmpReal->GetLineColor());
      histK = tmpReal;
      Scale(realBg, tmpReal);
#else
      histK = GetDeltaDist(realList, simList, b,
         realIPz->GetEntries(),
         simIPz ->GetEntries(), lim);
      TF1* kfit = new TF1("kfit", "pol0");
      histK->Fit(kfit, "Q0+");
      scale  = kfit->GetParameter(0);
      scaleE = kfit->GetParError(0);
      Scale(realBg, histK);
#endif 
    }
    else {
      scale = 1;
      scaleE = 0;
    }
  }
  if (!CheckConsistency(realMeas, simMeas)) {
    Warning("CorrectOneBin", "Real data (%s) and simulated data (%s) done "
      "with different binning", realList->GetName(), simList->GetName());
    return;
  }
  realMeas->SetName("realMeas");
  simMeas ->SetName("simMeas");
  realBg  ->SetName("realBg");
  simBg   ->SetName("simBg");
  trueGen ->SetName("trueGen");
  realMeas->SetTitle("Measured (real)");
  realBg  ->SetTitle("Background (real)");
  simMeas ->SetTitle("Measured (simulated)");
  simBg   ->SetTitle("Background (simulated)");
  trueGen ->SetTitle("Generated");
  realMeas->SetDirectory(0);
  simMeas ->SetDirectory(0);
  trueGen ->SetDirectory(0);
  realIPz ->SetDirectory(0);
  simIPz  ->SetDirectory(0);
  trueIPz ->SetDirectory(0);
  
  // Scale IPz histograms
  Double_t dummy;
  Double_t ipzMin  = realMeas->GetYaxis()->GetXmin();
  Double_t ipzMax  = realMeas->GetYaxis()->GetXmax();
  Double_t realNev = Integrate(realIPz,ipzMin,ipzMax,dummy);
  Double_t simNev  = Integrate(simIPz, ipzMin,ipzMax,dummy);
  Double_t trueNev = Integrate(trueIPz,ipzMin,ipzMax,dummy);
  realIPz->SetMarkerColor(kRed+2);  realIPz->SetMarkerStyle(20);
  simIPz ->SetMarkerColor(kBlue+2); simIPz ->SetMarkerStyle(21);
  trueIPz->SetMarkerColor(kBlack);  trueIPz->SetMarkerStyle(24);
#if 0
  // This is done in Rubens code 
  for (Int_t i = 1; i <= realIPz->GetNbinsX(); i++) {
    if (simIPz->GetBinContent(i) < 1e-6) {
      realIPz->SetBinContent(i,0);
      realIPz->SetBinError  (i,0);
    }
  }
#endif
  
  // Either scale fully here - up front 
  if (preScale) {
    CorrectForIPz(realMeas, realIPz,                       full);
    CorrectForIPz(realBg,   (realComb ? simIPz : realIPz), full);
    CorrectForIPz(simMeas,  simIPz,                        full);
    CorrectForIPz(simBg,    simIPz,                        full);
    CorrectForIPz(trueGen,  trueIPz,                       full);
  }
  // Or first scale by number of events in each sample 
  else {
    // Printf("Number of real events: %f", realNev);
    realMeas->Scale(1/realNev);
    realBg  ->Scale(1/(realComb ? simNev : realNev));
    realIPz ->Scale(1/realNev);
    simMeas ->Scale(1/simNev);
    simBg   ->Scale(1/simNev);
    simIPz  ->Scale(1/simNev);
    trueGen ->Scale(1/trueNev);
    trueIPz ->Scale(1/trueNev);
  }
  
  // Calculate real signal as measured minus background
  TH2* realSig = static_cast<TH2*>(realMeas->Clone("realSig"));
  realSig->SetTitle("Signal (real)");
  realSig->SetDirectory(0);
  CorrectSignal(realComb, realSig, realBg, simMeas);
  
  // Calculate simulated signal as measured minus background
  TH2* simSig = static_cast<TH2*>(simMeas->Clone("simSig"));
  simSig->SetTitle("Signal (simulated)");
  simSig->SetDirectory(0);
  // CorrectSignal(simComb, simSig, simBg, simMeas);
  simSig->Add(simBg, -1);

  // Calculate alpha as primary over simulated signal
  TH2* alpha = static_cast<TH2*>(trueGen->Clone("alpha"));
  alpha->SetTitle("#alpha");
  alpha->SetDirectory(0);
  alpha->Divide(simSig);
  // Create fiducial cut as cut on alpha 
  TH2* fiducial = static_cast<TH2*>(alpha->Clone("fiducial"));
  fiducial->SetTitle("Fiducial cut");
  fiducial->SetDirectory(0);
  for (Int_t i = 1; i <= fiducial->GetNbinsX(); i++) {
    for (Int_t j = 1; j <= fiducial->GetNbinsY(); j++) {
      Double_t a = fiducial->GetBinContent(i,j);
      fiducial->SetBinError(i,j,0);
      fiducial->SetBinContent(i,j, (a > 0 && a <= 2.5));
    }
  }
  alpha   ->Multiply(fiducial);

  // Create result as alpha times real signal 
  TH2* result = static_cast<TH2*>(realSig->Clone("result"));
  result->SetTitle("Result");
  result->SetDirectory(0);
  result->Multiply(alpha);  

  // The average mode
  UShort_t mode = (preScale ? (full ? 2 : 1) : 0);
  // Calculate the primary dN/deta
  TH1* truth  = Avg(trueGen, trueIPz, mode, "truth");
  truth->SetYTitle(dndetaTitle);
  SetAttr(truth, cc[b%11], 24, 1.5, 0, 3, 2);

  // Calculate the real dN/deta 
  TH1* dndeta = Avg(result, realIPz, mode, "dndeta");
  dndeta->SetYTitle(dndetaTitle);
  SetAttr(dndeta, cc[b%11], 20, 1.2, 0, 1, 1);
  if (full) {
    for (Int_t i = 1; i <= dndeta->GetNbinsX(); i++) {
      dndeta->SetBinError(i,1./3*dndeta->GetBinError(i));
    }
  }
  Double_t flim = 0.5;
  TF1* f = new TF1("ff", "pol0", -flim, flim);
  TFitResultPtr r = dndeta->Fit(f, "QN0RS", "", -flim, flim);
  Printf("dNch/deta %20s: %6.1f +/- %6.1f (%5.2f - %5.3f+/-%5.3f)",
   dir->GetName(),
   r->Parameter(0), r->ParError(0), r->Chi2()/r->Ndf(),
   scale, scaleE);


  // Multiply histograms by fiducial cut
  realMeas->Multiply(fiducial);
  simMeas ->Multiply(fiducial);
  realSig ->Multiply(fiducial);
  simSig  ->Multiply(fiducial); 
  realBg  ->Multiply(fiducial);
  simBg   ->Multiply(fiducial);
  realSig ->Multiply(fiducial);
  simSig  ->Multiply(fiducial);
  TH1* realAvgMeas = Avg(realMeas,realIPz, mode, "realAvgMeas",result);
  TH1* simAvgMeas  = Avg(simMeas, simIPz,  mode, "simAvgMeas", result);
  TH1* realAvgBg   = Avg(realBg,  realIPz, mode, "realAvgBg",  result);
  TH1* simAvgBg    = Avg(simBg,   simIPz,  mode, "simAvgBg",   result);
  TH1* realAvgSig  = Avg(realSig, realIPz, mode, "realAvgSig", result);
  TH1* simAvgSig   = Avg(simSig,  simIPz,  mode, "simAvgSig",  result);
  SetAttr(realAvgMeas, kGreen+2, 21);
  SetAttr(realAvgBg,   kGreen+2, 22);
  SetAttr(realAvgSig,  kGreen+2, 23);
  SetAttr(simAvgMeas,  kRed+2,   22);
  SetAttr(simAvgBg,    kBlue+2,  21);
  SetAttr(simAvgSig,   kBlue+2,  22);
  SetAttr(histK,       kGreen+2, 23);
  
  THStack* summary = new THStack("summary", dndeta->GetYaxis()->GetTitle());
  summary->Add(dndeta, "e2");
  summary->Add(truth,  "E");
  summary->Add(realAvgMeas);
  summary->Add(simAvgMeas);
  summary->Add(realAvgBg);
  summary->Add(simAvgBg);
  summary->Add(realAvgSig);
  summary->Add(simAvgSig);
  if (histK) {
    // histK->Scale(10);
    // histK->SetTitle(Form("%s\\times10",histK->GetTitle()));
    summary->Add(histK);
  }

  if (preScale) {
    // Scale vertex distributions
    realIPz->Scale(1/realNev);
    simIPz ->Scale(1/simNev);
    trueIPz->Scale(1/trueNev);
  }
  if (showOne){
    TCanvas* c = new TCanvas(Form("c%02d",b),
           Form("Centrality bin %d",b),
           1200, 1000);
    c->Divide(4,3); //,0,0);
    c->cd(1);  realMeas->DrawCopy("lego2 e");
    c->cd(2);  realBg  ->DrawCopy("lego2 e");
    c->cd(3);  realSig ->DrawCopy("lego2 e");
    c->cd(4);  realIPz ->DrawCopy();
    c->cd(4);  simIPz  ->DrawCopy("same");
    c->cd(4);  trueIPz ->DrawCopy("same");  
    c->cd(5);  simMeas ->DrawCopy("lego2 e");
    c->cd(6);  simBg   ->DrawCopy("lego2 e");
    c->cd(7);  simSig  ->DrawCopy("lego2 e");
    c->cd(8);  alpha   ->DrawCopy("lego2 e");
    c->cd(9);  fiducial->DrawCopy("lego2 e");
    c->cd(10); trueGen ->DrawCopy("lego2 e");
    c->cd(11); result  ->DrawCopy("lego2 e");
    c->cd(12); summary ->DrawClone("nostack");
    c->GetPad(4)->Modified();
    c->GetPad(12)->Modified();
    c->GetPad(4)->BuildLegend();
    c->GetPad(12)->BuildLegend();
    TLatex* ltx = new TLatex(.52, .3,
           Form("d#it{N}_{ch}/d#eta|_{|#eta|<%3.1f}"
          "=%6.1f#pm%6.1f (#chi^{2}/#nu=%5.2f)",
          flim, r->Parameter(0),
          r->ParError(0), r->Chi2()/r->Ndf()));
    ltx->SetTextAlign(23);
    ltx->SetNDC(true);
    ltx->SetTextFont(42);
    ltx->SetTextSize(0.035);    
    c->cd(12); ltx->Draw();
    ltx->DrawLatex(.52,.25,
       Form("%sk%s=%5.3f#pm%5.3f",
      histK ? "#LT" : "",
      histK ? "#GT" : "",
      scale,
      scaleE));
  }
  stack->Add(truth);
  stack->Add(dndeta, "e2");

  if (!dir) return;

  dir->cd();
  result ->Write();
  summary->Write();
  dndeta ->Write();
  if (histK) histK      ->Write();
  (new TParameter<double>("scale",  scale)) ->Write();
  (new TParameter<double>("scaleE", scaleE))->Write();

  TDirectory* det = dir->mkdir("details");
  det->cd();
  if (!preScale) {
    CorrectForIPz(realMeas, realIPz,                       full);
    CorrectForIPz(realBg,   (realComb ? simIPz : realIPz), full);
    CorrectForIPz(simMeas,  simIPz,                        full);
    CorrectForIPz(simBg,    simIPz,                        full);
    CorrectForIPz(trueGen,  trueIPz,                       full);
  }  
  realMeas ->Write();
  realBg   ->Write();
  realSig  ->Write();
  simMeas  ->Write();
  simBg    ->Write();
  simSig   ->Write();
  trueGen  ->Write();
  alpha    ->Write();
  fiducial ->Write();
  if (histK) histK->Write();
  THStack* deltas = new THStack("deltas", "#Delta distributions");
  deltas->Add(GetDelta(realList,"Data",b,realNev,0,    0,     lim));
  deltas->Add(GetDelta(simList, "Data",b,simNev, scale,scaleE,lim));
  deltas->Add(GetDelta(realList,"Inj", b,realNev,0,    0,     lim));
  deltas->Add(GetDelta(simList, "Inj", b,simNev, scale,scaleE,lim));
  deltas->Add(GetDelta(simList, "Comb",b,simNev, scale,scaleE,lim));
  deltas->Add(GetDelta(simList, "Prim",b,trueNev,scale,scaleE,lim));
  deltas->Add(GetDelta(simList, "Sec", b,trueNev,scale,scaleE,lim));
  TH1* sum = GetDelta(simList, "Prim", b,trueNev,0,    0,     lim);
  sum->Add(GetDelta(simList, "Sec",    b,trueNev,0,    0,     lim));
  sum->Add(GetDelta(simList, "Comb",   b,simNev, 0,    0,     lim));
  sum->SetTitle(Form("%5.3f#pm%5.3f #times (Prim+Sec+Comb)",scale,scaleE));
  Scale(sum,scale,scaleE);
  SetAttr(sum, kPink+2, 30);
  deltas->Add(sum);
  deltas->Write();
  
  TDirectory* avs = dir->mkdir("averages");
  avs->cd();
  realAvgMeas->Write();
  realAvgSig ->Write();
  realAvgBg  ->Write();
  simAvgMeas ->Write();
  simAvgSig  ->Write();
  simAvgBg   ->Write();
  realIPz    ->Write();
  simIPz     ->Write();
  trueIPz    ->Write();
  truth      ->Write();
  
}
/* @} */
//====================================================================
void
ShowStats(TList* list, const char* title, const char* path)
{
  Printf("=== %-15s - %s ===", title, path);
  TH1*   tmp   = GetH1(list, "hStat");
  if (!tmp) {
    Warning("", "No stats");
    return;
  }
  TH1*   stats = static_cast<TH1*>(tmp->Clone());
  stats->SetDirectory(0);
  TAxis* axis  = stats->GetXaxis();
  for (Int_t i = 1; i <= 4; i++) {
    Printf("%31s: %f", axis->GetBinLabel(i), stats->GetBinContent(i));
  }
  Double_t scale = stats->GetBinContent(4);
  stats->Scale(1/scale);
  for (Int_t i = 6; i <= 23; i++) {
    Printf("%31s: %f", axis->GetBinLabel(i), stats->GetBinContent(i));
  }
}  
/* @} */

//____________________________________________________________________
void SimpleCorrect(UShort_t    flags=0x3,
       UShort_t    scaleMode=1, 
       const char* realFileName="trdt.root",
       const char* simFileName="trmc.root",
       Int_t       nBins=9,
       const char* otherFileName="")
{
  TFile* realFile  = TFile::Open(realFileName,  "READ");
  TFile* simFile   = TFile::Open(simFileName,   "READ");
  TFile* otherFile = 0;
  if (otherFileName && otherFileName[0] != '\0') 
    otherFile = TFile::Open(otherFileName, "READ");
  TList* realList  = static_cast<TList*>(realFile->Get("clist"));
  TList* simList   = static_cast<TList*>(simFile ->Get("clist"));
  TObjArray* otherList = 0;
  if (otherFile)
    otherList =static_cast<TObjArray*>(otherFile->Get("TObjArray"));

  ShowStats(realList, "Real data",     realFile->GetName());
  ShowStats(simList,  "Simulated data",simFile ->GetName());

  TH1* realCent = GetH1(realList, "EvCentr");
  TH1* simCent  = GetH1(simList,  "EvCentr");
  if (!CheckConsistency(realCent, simCent)) {
    Warning("SimpleCorrection","Inconsistent centralities");
    return;
  }
  TH2* realIpz = GetH2(realList, "b0_TrData_ZvEtaCutT");
  TH2* simIpz  = GetH2(simList,  "b0_TrData_ZvEtaCutT");
  if (!CheckConsistency(realIpz, simIpz)) {
    Warning("SimpleCorrection", "Inconsistent IPz or eta axis");
    return;
  }
  

  Double_t deltaLim  = 1e9;
  Bool_t   realComb  = flags & 0x1;
  Bool_t   simComb   = flags & 0x2;
  Bool_t   preScale  = flags & 0x4;
  Bool_t   full      = flags & 0x8;
  Bool_t   showOne   = flags & 0x20;
  // UShort_t scaleMode = (flags & 0x40 ? 0 : (flags & 0x80 ? 1 : 2));
  Printf("Real background:      %s\n"
   "Simulated background: %s\n"
   "Pre-scale:            %s\n"
   "Full pre-scale:       %s\n"
   "Show each bin:        %s\n"
   "Delta upper limit:    %g\n"
   "Scaling mode:         %s",
   (realComb ? "comb" : "inj"),
   (simComb  ? "comb" : "inj"),
   (preScale ? "yes"  : "no"),
   (full     ? "yes"  : "no"),
   (showOne  ? "yes"  : "no"),
   deltaLim,
   (scaleMode==0 ?"fixed"  :
    scaleMode==1 ? "c"     :
    scaleMode==2 ? "eta-c" :
    "unit"));
   
   
  if (flags & 0x10) realList = simList;
  TString tit;
  tit.Form("Real BG: %s  Simulated BG: %s%s",
     realComb ? "MC-labels" : "Injection",
     simComb  ? "MC-labels" : "Injection",
     preScale ? " (pre-scaled)" : "");

  TFile*   output = TFile::Open(Form("result_0x%x.root", flags&0x3),
        "RECREATE");
  realCent->Write("cent");
  THStack* res    = new THStack("result", tit);
  TH1*     cent   = GetH1(realList, "EvCentr");
  for (Int_t b = 0; b < nBins; b++) {
    Double_t c1 = cent->GetXaxis()->GetBinLowEdge(b+1);
    Double_t c2 = cent->GetXaxis()->GetBinUpEdge (b+1);
    TString  name;
    name.Form("cent%03dd%02d_%03dd%02d",
        Int_t(c1), Int_t(c1*100)%100,
        Int_t(c2), Int_t(c2*100)%100);
    TDirectory* dir = output->mkdir(name);
    CorrectOneBin(res,dir,b,realList,simList,realComb,simComb,preScale,full,
      showOne, scaleMode, deltaLim);

    if (otherList) {
      TH1* od = GetH1(otherList, Form("bin%d_DataCorrSignal_Bla",b));
      TH1* ot = GetH1(otherList, Form("bin%d_MCTruth",b));
      TH1* td = static_cast<TH1*>(od->Clone("otherdNdeta"));
      TH1* tt = static_cast<TH1*>(ot->Clone("otherTruth"));
      td->SetDirectory(0);
      tt->SetDirectory(0);
      SetAttr(td, cc[b%11], 21, 1.2, 3004, 1, 1);
      SetAttr(tt, cc[b%11], 25, 1.4, 0, 7, 3);
      if (td->GetMinimum() < 1e-6) { td->SetMinimum(); td->SetMaximum(); }
      if (tt->GetMinimum() < 1e-6) { tt->SetMinimum(); tt->SetMaximum(); }
      res->Add(td, "e2");
      res->Add(tt);
      dir->cd();
      td->Write();
      tt->Write();
    }
  }
  // TCanvas* all = new TCanvas("all", "all");
  // res->Draw("nostack");
  res->SetMaximum(1.2*res->GetMaximum("nostack"));
  output->cd();
  res->Write();
  output->Write();

}
/* @} */
//
// EOF
//