FGolf/Tools/histtools.C

#ifndef HISTTOOLS_H
#define HISTTOOLS_H

#include "TList.h"
#include "TObjArray.h"
#include "TH1.h"
#include "TH2.h"
#include "TLegend.h"
#include "THStack.h"
#include "TCanvas.h"
#include "TFile.h"
#include "TRegexp.h"
#include "TKey.h"
#include <iostream>
#include <vector>

#include "histtools.h"
namespace hist {

  //Add all histograms whose names match the given regular expression pattern
  //or begin with the given prefix.  If the final histogram named outHistName
  //does not exist it is created.

  void add(const char* outHistName, const char* patORpfx) {
    TRegexp reg(patORpfx, kFALSE);

    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();

    TObject* obj = 0;
    TObject* hist = 0;
    Bool_t makeOutHist = false;

    hist = gDirectory->Get(outHistName);
    //If out hist does not exist, remember to create it
    if (! hist) makeOutHist = true;

    while ((obj = iter->Next())) {
      if (! obj->InheritsFrom(TH1::Class())) continue;

      TString name = obj->GetName();
      //Don't add out hist
      if (name == TString(outHistName)) continue;

      if (TString(patORpfx).MaybeRegexp()) {
        if (TString(obj->GetName()).Index(reg) < 0 ) continue;
      } else if (! name.BeginsWith(patORpfx)) continue;

      if (makeOutHist) {
        hist = obj->Clone(outHistName);

        if (hist->InheritsFrom(TH2::Class()))
          ((TH2*)hist)->Reset();
        else
          ((TH1*)hist)->Reset();

        ((TH1*)hist)->SetTitle(outHistName);
        ((TH1*)hist)->Sumw2();
        makeOutHist = false;
      }

      ((TH1*)hist)->Add((TH1*)obj);
    }
  }

  //Add all histograms whose names match one of ten possible regular expression
  //patterns or begin with one of ten possible given prefixes.  Feel free to
  //mix and match regular expression patterns and prefixes.  If the final hist-
  //ogram named outHistName does not exist it is created.

  void add(const char* outHistName,   const char* patORpfx0,     const char* patORpfx1,     const char* patORpfx2, 
           const char* patORpfx3, const char* patORpfx4, const char* patORpfx5, const char* patORpfx6, 
           const char* patORpfx7, const char* patORpfx8, const char* patORpfx9)
  {
    add(outHistName, patORpfx0);
    add(outHistName, patORpfx1);
    if (patORpfx2) add(outHistName, patORpfx2);
    if (patORpfx3) add(outHistName, patORpfx3);
    if (patORpfx4) add(outHistName, patORpfx4);
    if (patORpfx5) add(outHistName, patORpfx5);
    if (patORpfx6) add(outHistName, patORpfx6);
    if (patORpfx7) add(outHistName, patORpfx7);
    if (patORpfx8) add(outHistName, patORpfx8);
    if (patORpfx9) add(outHistName, patORpfx9);
  }


  //For all histograms whose names match the given regular expression pattern
  //or begin with the given prefix, set the fill, line and marker colors to the
  //given value.

  void color(const char* patORpfx, Color_t color) {
       
    TRegexp reg(patORpfx, kFALSE);

    TList* list = gDirectory->GetList() ;

    TIterator* iter = list->MakeIterator();

    TObject* obj = 0;

    while ((obj = iter->Next())) {
      if (! obj->InheritsFrom(TH1::Class())) continue;

      TString name = obj->GetName();

      if (TString(patORpfx).MaybeRegexp()) {
        if (TString(obj->GetName()).Index(reg) < 0 ) continue;
      } else if (! name.BeginsWith(patORpfx)) continue;

      ((TH1*)obj)->SetFillColor(color);
      ((TH1*)obj)->SetLineColor(color);
      ((TH1*)obj)->SetMarkerColor(color);
    }
  }


  void pattern(const char* patORpfx, Color_t pattern) {
    TRegexp reg(patORpfx, kFALSE);
    
    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();
    
    TObject* obj = 0;

    while ((obj = iter->Next())) {
      if (! obj->InheritsFrom(TH1::Class())) continue;

      TString name = obj->GetName();

      if (TString(patORpfx).MaybeRegexp()) {
        if (TString(obj->GetName()).Index(reg) < 0 ) continue;
      } else if (! name.BeginsWith(patORpfx)) continue;

      ((TH1*)obj)->SetFillStyle(pattern);
    }
  }


  //Return a pointer to a TLegend with an entry for each histogram drawn on a
  //given TCanvas.  Display either the line, point or fill values.  Optionally
  //apply colors to all histograms.  By default, entry labels are the names of
  //their respective histograms.  Optionally, if histogram names are of the
  //form XX_YY_ZZ_WW, entry labels can be XX (token=0), YY (token=1), etc.

  TLegend* legend(TCanvas* canvas, Option_t* option, Bool_t addColor, Int_t token,
                  Float_t xmin, Float_t ymin, Float_t xmax, Float_t ymax) {
    if(! canvas) return 0;

    TLegend* leg = new TLegend(xmin, ymin, xmax, ymax);
    TList* list = canvas->GetListOfPrimitives();
    //       TIterator* iter = list->MakeIterator();

    TObject* obj = 0;

    //Hist color iterator
    Int_t colorIt = 1;

    //while (obj = iter->Next()) {
    for(int i = list->GetSize() - 1 ; i >=0 ; i--) {
      obj = list->At(i);
      if (! obj->InheritsFrom(TH1::Class())) continue;

      if (addColor) {
        hist::color(obj->GetName(), colorIt);
        ++colorIt;
      }
         

      if (token == -1)
        leg->AddEntry(obj, obj->GetName(), option);
      else {
        TString name(obj->GetName());
        TObjArray* a = name.Tokenize("_");
        if (a->GetEntries() <= token)
          leg->AddEntry(obj, obj->GetName(), option);
        else
          leg->AddEntry(obj, a->At(token)->GetName(), option);
      }
    }

    return leg;
  }

  //Return a pointer to a TLegend with an entry for each histogram added to a
  //given THStack.  Display either the line, point or fill values.  Optionally
  //apply colors to all histograms.  By default, entry labels are the names of
  //their respective histograms.  Optionally, if histogram names are of the
  //form XX_YY_ZZ_WW, entry labels can be XX (token=0), YY (token=1), etc.

  TLegend* legend(THStack* stack, Option_t* option, Bool_t addColor, Int_t token,
                  Float_t xmin, Float_t ymin, Float_t xmax, Float_t ymax,
                  TH1F *hdata) {
    
    if(! stack) return 0;

    TLegend* leg = new TLegend(xmin, ymin, xmax, ymax);
    leg->SetFillColor(kWhite);
    TList* list = stack->GetHists();
    //       TIterator* iter = list->MakeIterator();

    TObject* obj = 0;


    if(hdata != NULL) 
      leg->AddEntry(hdata, "Data", "P");
      

    //Hist color iterator
    Int_t colorIt = 1;

    //while (obj = iter->Next()) {
    for(int i = list->GetSize() - 1 ; i >=0 ; i--) {
      obj = list->At(i);
      if (! obj->InheritsFrom(TH1::Class())) continue;
      TString name(obj->GetName());

      if(name.Contains("QCD"))
        continue;

      if (addColor) {
        hist::color(obj->GetName(), colorIt);
        ++colorIt;
      }
         
      if (token == -1)
        leg->AddEntry(obj, obj->GetName(), option);
      else {
        TString name(obj->GetName());
        TObjArray* a = name.Tokenize("_");
        TString entry(a->GetEntries() <= token ? obj->GetName() : a->At(token)->GetName());
        
        if (entry == "t"){
          entry = "Single top";
        }else if (entry == "ttbar"){
          entry = "#font[12]{t#bar{t}}";
        } else if (entry == "ttdil"){
          entry = "#font[12]{t#bar{t}} signal";
        } else if (entry == "ttotr"){
          entry = "#font[12]{t#bar{t}} other";
        } else if (entry == "VV"){
          //entry = "#font[12]{ZZ}, #font[12]{WZ}, #font[12]{ZZ}";
          entry = "#font[12]{VV}";
        } else if (entry == "DYtautau"){
          //entry = "DY#rightarrow #tau#tau";
          entry = "Z/#gamma*#rightarrow#tau^{+}#tau^{-}";
        } else if (entry == "DYeemm"){
          //entry = "DY#rightarrow #font[12]{ee}, #mu#mu";
          entry = "Z/#gamma*#rightarrowl^{+}l^{-}";
        } else if (entry == "wjets"){
          //entry = "#font[12]{W}+jets";
          entry = "#font[12]{W}#rightarrowl#nu";
        }else {
          entry.ReplaceAll("tautau", "#tau#tau");
          entry.ReplaceAll("mm", "#mu#mu");
        }
        leg->AddEntry(obj, entry, option);
      }
    }

    return leg;
  }

  //Normalize to one all histograms whose names match the given regular exp-
  //ression pattern or begin with the given prefix.

  void normalize(const char* patORpfx) {
    TRegexp reg(patORpfx, kFALSE);

    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();

    TObject* obj = 0;

    while ((obj = iter->Next())) {
      if (! obj->InheritsFrom(TH1::Class())) continue;

      TString name = obj->GetName();

      if (TString(patORpfx).MaybeRegexp()) {
        if (TString(obj->GetName()).Index(reg) < 0 ) continue;
      } else if (! name.BeginsWith(patORpfx)) continue;

      Double_t integral = 0;

      if (obj->InheritsFrom(TH2::Class()))
        integral = ((TH2*)obj)->Integral();
      else
        integral = ((TH1*)obj)->Integral();

      if (integral) {
        ((TH1*)obj)->Sumw2();
        ((TH1*)obj)->Scale(1./integral);
      }
    }
  }

  //Scale by the given value all histograms whose names match the given regular
  //expression pattern or begin with the given prefix.

  void scale(const char* patORpfx, Double_t scale) {
    TRegexp reg(patORpfx, kFALSE);

    TList* list = gDirectory->GetList()   ;
    TIterator* iter = list->MakeIterator();

    TObject* obj = 0;

    while ((obj = iter->Next())) {
      if (! obj->InheritsFrom(TH1::Class())) continue;

      TString name = obj->GetName();

      if (TString(patORpfx).MaybeRegexp()) {
        if (TString(obj->GetName()).Index(reg) < 0 ) continue;
      } else if (! name.BeginsWith(patORpfx)) continue;


      if ((((TH1*)obj)->GetNbinsX()+2) != ((TH1*)obj)->GetSumw2N())        
           ((TH1*)obj)->Sumw2();

      ((TH1*)obj)->Scale(scale);
    }
  }

  //Don't you hate it when you draw multiple histograms on the same canvas only
  //to find that the bottom histogram's range does not encompass those of the
  //histograms drawn on top?  This method determines the maximum and minimum y
  //range of all the histograms drawn on a given TCanvas and appropriately re-
  //sizes the bottom histogram.

  void setrangey(TCanvas* canvas) {
    if(! canvas) return ;

    TList* list = canvas->GetListOfPrimitives();
    TIterator* iter = list->MakeIterator();

    TObject* obj = 0;
    TObject* top = 0;

    //Extremes
    Double_t maxy = -999999;
    Double_t miny = 999999;

    while ((obj = iter->Next())) {
      if (! obj->InheritsFrom(TH1::Class())) continue;

      if (! top) top = obj;

      if (((TH1*)obj)->GetMaximum() > maxy) maxy = ((TH1*)obj)->GetMaximum();
      if (((TH1*)obj)->GetMinimum() < miny) miny = ((TH1*)obj)->GetMinimum();
    }

    ((TH1*)top)->SetMaximum(maxy*1.3);
    //Protect against log scale
    if (canvas->GetLogy() && ! miny)
      ((TH1*)top)->SetMinimum(1E-3);
    else
      ((TH1*)top)->SetMinimum(miny*0.7);
  }

  //Create a stacked histogram consisting of all histograms whose names match
  //the given regular expression pattern or begin with the given prefix.  If
  //the THStack named stackHistName does not exist it is created.  Optionally
  //apply colors to all histograms.  Set drawOption to "nostack" if you do not
  //want to stack, to "hist" to display histograms without errors, to "histe"
  //to display histograms with errors, etc.

  void stack(const char* stackHistName, const char* patORpfx, Bool_t addColor, Option_t* drawOption, Int_t orderScheme,
             const char* bsmName, bool doRefPats, std::string prefixToSkip){//, float yMinimum) {
    TRegexp reg(patORpfx, kTRUE);
      
    TList* list = gDirectory->GetList() ;

    TObject* obj = 0;
    TObject* stack = 0;
    Bool_t makeStackHist = false;

    stack = gDirectory->Get(stackHistName);
    //If stack hist does not exist, remember to create it
    if (! stack) makeStackHist = true;

    //Hist color iterator
    Int_t colorIt = 1;

    std::vector<TString*>  pats(0);
    if (orderScheme == 0){
      pats.push_back(new TString(""));
      //pats.push_back(new TString(""));
      //pats.push_back(new TString("ttdil_"));
      //pats.push_back(new TString("ttotr_"));
      //pats.push_back(new TString("DYeemm_"));
      //pats.push_back(new TString("DYtautau_"));
      //pats.push_back(new TString("wjets_"));
      //pats.push_back(new TString("VV_"));
      //pats.push_back(new TString("tw_"));
      //pats.push_back(new TString("data_"));      
    } else if (orderScheme == 1) {
      //this requires some care: only the histograms beginning with what's in the pattern will be processed
      pats.push_back(new TString("ttdil_"));
      pats.push_back(new TString("ttotr_"));
      pats.push_back(new TString("t_"));
      pats.push_back(new TString("VV_"));
      pats.push_back(new TString("DYtautau_"));
      pats.push_back(new TString("DYeemm_"));
      pats.push_back(new TString("wjets_"));
      pats.push_back(new TString("QCD_"));
      //      pats.push_back(new TString("Vgamma_"));

      if (doRefPats){
        pats.push_back(new TString("ref_ttdil_"));
        pats.push_back(new TString("ref_ttotr_"));
        pats.push_back(new TString("ref_t_"));
        pats.push_back(new TString("ref_VV_"));
        pats.push_back(new TString("ref_DYtautau_"));
        pats.push_back(new TString("ref_DYeemm_"));
        pats.push_back(new TString("ref_wjets_"));
        pats.push_back(new TString("ref_QCD_"));
        //      pats.push_back(new TString("ref_Vgamma_"));
      }
    } else if (orderScheme == 2) {
      //this requires some care: only the histograms beginning with what's in the pattern will be processed
      pats.push_back(new TString("ttdil_"));
      pats.push_back(new TString("ttotr_"));
      pats.push_back(new TString("t_"));
      pats.push_back(new TString("VV_"));
      pats.push_back(new TString("DYtautau_"));
      pats.push_back(new TString("DYeemm_"));
      pats.push_back(new TString("wjets_"));
      pats.push_back(new TString("QCD_"));
      pats.push_back(new TString("Vgamma_"));
      if (bsmName!=0) pats.push_back(new TString(Form("%s_",bsmName)));

      if (doRefPats){
        pats.push_back(new TString("ref_ttdil_"));
        pats.push_back(new TString("ref_ttotr_"));
        pats.push_back(new TString("ref_t_"));
        pats.push_back(new TString("ref_VV_"));
        pats.push_back(new TString("ref_DYtautau_"));
        pats.push_back(new TString("ref_DYeemm_"));
        pats.push_back(new TString("ref_wjets_"));
        pats.push_back(new TString("ref_QCD_"));
        pats.push_back(new TString("ref_Vgamma_"));
        if(bsmName!=0) pats.push_back(new TString(Form("ref_%s_",bsmName)));
      }
    } else {
      pats.push_back(new TString(""));
    }

    for (unsigned int iPat = 0; iPat < pats.size(); ++iPat) {
      TIterator* iter = list->MakeIterator();
      while ((obj = iter->Next())) {
        if (! obj->InheritsFrom(TH1::Class())) continue;
        //((TH1F*)obj)->SetMinimum(yMinimum);
        TString name = obj->GetName();
        if(prefixToSkip != "" && name.BeginsWith(prefixToSkip.c_str())) continue;
        //if(name.Contains("data"))
        if (!( name.BeginsWith(pats[iPat]->Data()))) continue;
        
        if (TString(patORpfx).MaybeRegexp()) {
          if (TString(obj->GetName()).Index(reg) < 0 ) continue;
        } else if (! name.BeginsWith(patORpfx)) continue;
        
        if (makeStackHist) {
          stack = new THStack(stackHistName, stackHistName);
          makeStackHist = false;
        }
        
        if (addColor) {
          hist::color(obj->GetName(), colorIt);
          ++colorIt;
        }
        ((THStack*)stack)->Add((TH1*)obj, drawOption);
        
      }
      //      delete pats[iPat];//cleanup
    }
  

    // Currently breaks .ls
    //gDirectory->Append(stack);
  }
  
  //Set the x-axis title of all histograms whose names match the given regular
  //expression pattern or begin with the given prefix.
  
  void xaxis(const char* patORpfx, const char* title) {
    TRegexp reg(patORpfx, kFALSE);

    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();

    TObject* obj = 0;

    while ((obj = iter->Next())) {
      if (! (obj->InheritsFrom(TH1::Class()) || obj->InheritsFrom(THStack::Class()))) continue;

      TString name = obj->GetName();

      if (TString(patORpfx).MaybeRegexp()) {
        if (TString(obj->GetName()).Index(reg) < 0 ) continue;
      } else if (! name.BeginsWith(patORpfx)) continue;

      if (obj->InheritsFrom(TH1::Class()))
        ((TH1*)obj)->GetXaxis()->SetTitle(title);
      if (obj->InheritsFrom(THStack::Class())) {
        ((THStack*)obj)->Draw();
        ((THStack*)obj)->GetXaxis()->SetTitle(title);
      }
    }
  }

  //Set the y-axis title of all histograms whose names match the given regular
  //expression pattern or begin with the given prefix.

  void yaxis(const char* patORpfx, const char* title) {
    TRegexp reg(patORpfx, kFALSE);

    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();

    TObject* obj = 0;

    while ((obj = iter->Next())) {
      if (! (obj->InheritsFrom(TH1::Class()) || obj->InheritsFrom(THStack::Class()))) continue;

      TString name = obj->GetName();

      if (TString(patORpfx).MaybeRegexp()) {
        if (TString(obj->GetName()).Index(reg) < 0 ) continue;
      } else if (! name.BeginsWith(patORpfx)) continue;

      if (obj->InheritsFrom(TH1::Class()))
        ((TH1*)obj)->GetYaxis()->SetTitle(title);
      if (obj->InheritsFrom(THStack::Class())) {
        ((THStack*)obj)->Draw();
        ((THStack*)obj)->GetYaxis()->SetTitle(title);
      }
    }
  }

  // Input:  2 histogram
  // Output: one histogram which is the efficiency:
  // h1 :  TOTAL NUMBER OF EVENTS
  // h2 :  NUMBER OF EVENTS THAT PASS

#include "TH1.h"

  // Method by pointer
  TH1F* eff(TH1F* h1, TH1F* h2, const char* name){

    // first, verify that all histograms have same binning
    // nx is the number of visible bins
    // nxtot = nx+2 includes underflow and overflow
    Int_t nx = h1->GetNbinsX();
    if (h2->GetNbinsX() != nx) {
      cout << "Histograms must have same number of bins" << endl;
      return 0;
    }

    // get the new histogram
    TH1F* temp = (TH1F*) h1->Clone(name);
    temp->SetTitle(name);
    temp->Reset();
    temp->Sumw2();

    // Do the calculation
    temp->Divide(h2,h1,1.,1.,"B");

    // Done
    return temp;
  }


  // Method by name
  TH1F* eff(const char* name1, const char* name2, const char* name){

    // Get a list of object and their iterator
    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();

    // Loop over objects, set the pointers
    TObject* obj;
    TH1F* h1=0;
    TH1F* h2=0;
    TString str1 = Form("%s",name1);
    TString str2 = Form("%s",name2);
    while((obj=iter->Next())) {
      TString objName = obj->GetName();
      if (objName == str1) h1 = (TH1F*) obj;
      if (objName == str2) h2 = (TH1F*) obj;
    }

    // quit if not found
    if (h1 == 0) {
      cout << "Histogram " << name1 << " not found" << endl;
      return 0;
    }
    if (h2 == 0) {
      cout << "Histogram " << name2 << " not found" << endl;
      return 0;
    }

    // Call the method by pointer
    TH1F* temp = eff(h1, h2, name);
    return temp;
  }
  // Input:  4 histogram
  // Output: one histogram which is the BG subtracted efficiency:
  // h1 :  TOTAL NUMBER OF EVENTS, SIGNAL REGION
  // h2 :  NUMBER OF EVENTS THAT PASS, SIGNAL REGION
  // h3 :  TOTAL NUMBER OF EVENTS, SIDE BAND
  // h4 :  NUMBER OF EVENTS THAT PASS, SIDE BAND

#include "TH1.h"


  TH1F* eff_bg(TH1F* h1, TH1F* h2, TH1F* h3, TH1F* h4, const char* name){

    // first, verify that all histograms have same binning
    // nx is the number of visible bins
    // nxtot = nx+2 includes underflow and overflow
    Int_t nx = h1->GetNbinsX();
    Int_t nxtot = nx + 2;
    if (h2->GetNbinsX() != nx) {
      cout << "Histograms must have same number of bins" << endl;
      return 0;
    }
    if (h3->GetNbinsX() != nx) {
      cout << "Histograms must have same number of bins" << endl;
      return 0;
    }
    if (h3->GetNbinsX() != nx) {
      cout << "Histograms must have same number of bins" << endl;
      return 0;
    }

    // get the new histogram
    TH1F* temp = (TH1F*) h1->Clone(name);
    temp->SetTitle(name);
    temp->Reset();
    temp->Sumw2();

    // Loop over bins, calculate efficiency and error, put it in histogram
    for (Int_t i=0; i<nxtot; i++) {
      Double_t x1 = h1->GetBinContent(i);
      Double_t x2 = h2->GetBinContent(i);
      Double_t x3 = h3->GetBinContent(i);
      Double_t x4 = h4->GetBinContent(i);
      Double_t denom = x1 - x3;
      Double_t eff;
      if (denom == 0.) {
        eff = 0;
      } else {
        eff   = (x2-x4)/denom;
      }
      Double_t failSig = x1 - x2;
      Double_t failBg  = x3 - x4;
      Double_t blah    = (1-eff)*(1-eff)*(x2+x4) + eff*eff*(failSig+failBg);
      if (blah <= 0.) blah=0.0;
      Double_t err;
      if (denom == 0) {
        err = 0.;
      } else {
        err = sqrt(blah)/denom;
      }
      temp->SetBinContent(i,eff);
      temp->SetBinError(i,err);
    }

    // Done
    return temp;
  }

#include <TList.h>
#include <TIterator.h>

  void deleteHistos() {
    // Delete all existing histograms in memory
    TObject* obj;
    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();
    while ((obj=iter->Next())) {
      if (obj->IsA()->InheritsFrom(TH1::Class()) ||
          obj->IsA()->InheritsFrom(TH2::Class()) ) {delete obj;}
    }
  }
  void histio()
  {
  }

  void saveHist(const char* filename, const char* pat)
  {
    TList* list = gDirectory->GetList() ;
    TIterator* iter = list->MakeIterator();

    TRegexp re(pat,kTRUE) ;

    TFile outf(filename,"RECREATE") ;
    while(TObject* obj=iter->Next()) {
      if (TString(obj->GetName()).Index(re)>=0) {
        obj->Write() ;
        cout << "." ;
        cout.flush() ;
      }
    }
    cout << endl ;
    outf.Close() ;

    delete iter ;
  }


  void loadHist(const char* filename, const char* pfx, const char* pat, Bool_t doAdd)
  {
    TFile inf(filename) ;
    //inf.ReadAll() ;
    TList* list = inf.GetListOfKeys() ;
    TIterator* iter = list->MakeIterator();

    TRegexp re(pat,kTRUE) ;
    if (pat!=0) cout << "pat = " << pat << endl ;
    else cout<<"no pattern: read all"<<endl;

    gDirectory->cd("Rint:") ;

    TObject* obj ;
    TKey* key ;
    cout << "doAdd = " << (doAdd?"T":"F") << endl ;
    cout << "loadHist: reading." ;
    while((key=(TKey*)iter->Next())) {

      //      Int_t ridx = TString(key->GetName()).Index(re) ;
      //      cout<<"reading "<<key->GetName()<<std::endl;
      if (pat!=0){
        //      cout<<"Check patt "<<pat<<endl;
        if (TString(key->GetName()).Index(re)==-1) {
          continue ;
        }
      }

      obj = inf.Get(key->GetName()) ;
      TObject* clone ;
      if (pfx) {

        // Find existing TH1-derived objects
        TObject* oldObj = 0 ;
        if (doAdd){
          oldObj = gDirectory->Get(Form("%s_%s",pfx,obj->GetName())) ;
          if (oldObj && !oldObj->IsA()->InheritsFrom(TH1::Class())) {
            oldObj = 0 ;
          }
        }
        if (oldObj) {
          clone = oldObj ;
          ((TH1*)clone)->Add((TH1*)obj) ;
        } else {
          clone = obj->Clone(Form("%s_%s",pfx,obj->GetName())) ;
        }


      } else {

        // Find existing TH1-derived objects
        TObject* oldObj = 0 ;
        if (doAdd){
          oldObj = gDirectory->Get(key->GetName()) ;
          if (oldObj && !oldObj->IsA()->InheritsFrom(TH1::Class())) {
            oldObj = 0 ;
          }
        }

        if (oldObj) {
          clone = oldObj ;
          ((TH1*)clone)->Add((TH1*)obj) ;
        } else {
          clone = obj->Clone() ;
        }
      }
      if (!gDirectory->GetList()->FindObject(clone)) {
        gDirectory->Append(clone) ;
      }
      //cout << "." ;
      cout.flush() ;
    }
    cout << endl;
    inf.Close() ;
    delete iter ;
  }


  //takes in a vector of prefixes, and a output prefix. Combines all histograms 
  //whose prefixes matches those in the input vector of TStrings into a new histogram
  //with the the outPrefix
  void combineHists(const std::vector<TString> v_prfxsToCombine, const TString outPrefix) {

    
    if(v_prfxsToCombine.size() == 0) {
      cout << "Input vector size is 0" << endl;
    }
    //histogram of common suffixes
    vector<TString> v_suffixes;
    //get the list of histograms that match the first entry in the prefix
    TString temp = v_prfxsToCombine.at(0);
    TList *rootlist = gDirectory->GetList();
    
    for(int i = 0; i < rootlist->GetSize(); i++) {
      
      TObject *obj = rootlist->At(i);
      TString name = obj->GetName();
      if(!obj->InheritsFrom(TH1::Class()))
        continue;
      if(!name.BeginsWith(temp+"_"))
        continue;

      name.ReplaceAll(temp+"_", "_");

      
      if(obj->InheritsFrom(TH2::Class())) {
        TH2F *h = dynamic_cast<TH2F*>(obj->Clone());
        h->SetName((outPrefix+name).Data());
        h->SetTitle((outPrefix+name).Data());
        for(unsigned int j = 1; j < v_prfxsToCombine.size(); j++) {
          TH2F *htemp = dynamic_cast<TH2F*>(gDirectory->Get((v_prfxsToCombine.at(j) + name).Data()));
          h->Add(htemp);
        }       
      } else if(obj->InheritsFrom(TH1::Class())) {
        TH1F *h = dynamic_cast<TH1F*>(obj->Clone());
        h->SetName((outPrefix+name).Data());
        h->SetTitle((outPrefix+name).Data());
        for(unsigned int j = 1; j < v_prfxsToCombine.size(); j++) {
          TH1F *htemp = dynamic_cast<TH1F*>(gDirectory->Get((v_prfxsToCombine.at(j) + name).Data()));
          //cout << "TH1F: " << v_prfxsToCombine.at(j) + name << endl;
          if(htemp == NULL)
            cout << "htemp is NULL" << endl;
          h->Add(htemp);
        }
      }
    }//rootlist loop


    //now delete the histos that match the prfxs to combine
    for(unsigned int i = 0; i < v_prfxsToCombine.size(); i++ ) {
      
      // Delete all existing histograms in memory
      TObject* obj;
      TList* list = gDirectory->GetList() ;
      TIterator* iter = list->MakeIterator();
      while ((obj=iter->Next())) {
        TString name = obj->GetName();
        if(name.BeginsWith(outPrefix+"_"))
          continue;
        if(TString(obj->GetName()).BeginsWith(v_prfxsToCombine.at(i).Data())) {
          if (obj->IsA()->InheritsFrom(TH1::Class()) ||
              obj->IsA()->InheritsFrom(TH2::Class()) )
            delete obj;
        }
      }
    }//loop over prefixes
   
  }//fnc declaration
  
}
#endif
Revision:	1.1
Committed:	Sun Aug 29 18:39:12 2010 UTC (14 years, 8 months ago) by fgolf
Content type:	text/plain
Branch:	MAIN
CVS Tags:	synchMay2011v1, ss20May2011, ss2010_10_06, fkwsynch3pbv2, fkw_3pb_samesign_synch
Log Message:	some more useful tools for a variety of studies