FGolf/Tools/histtools.cc

#include "TCanvas.h"
#include "TFile.h"
#include "TH1.h"
#include "TH2.h"
#include "THStack.h"
#include "TKey.h"
#include "TLegend.h"
#include "TRegexp.h"
#include "histtools.h"
#include <TIterator.h>
#include "TClass.h"

#include <iostream>
#include <math.h>

using namespace std;

namespace hist {

    void add(const char* outHistName, const char* patORpfx);

    //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);
    }

    //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);
        }
    }

    //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() ;
        if (!list) {
            cout << "Failed to set color for " << patORpfx << endl;
            return;
        }
        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);
        }
    }

    //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()) ) {
            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;
    }

    //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)->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*1.9);
        //Protect against log scale
        if (canvas->GetLogy() && ! miny)
            ((TH1*)top)->SetMinimum(1E-4);
        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) {
        TRegexp reg(patORpfx, kFALSE);

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

        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;

        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 (makeStackHist) {
                stack = new THStack(stackHistName, stackHistName);
                makeStackHist = false;
            }

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

            ((THStack*)stack)->Add((TH1*)obj, drawOption);
        }

        // 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:  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


    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;
    }

    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 verbose, Bool_t doAdd)
    {
        TFile inf(filename) ;
        //inf.ReadAll() ;
        TList* list = inf.GetListOfKeys() ;
        TIterator* iter = list->MakeIterator();

        TRegexp re(pat,kTRUE) ;
        if (verbose)
            std::cout << "pat = " << pat << std::endl;

        gDirectory->cd("Rint:") ;

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

            Int_t ridx = TString(key->GetName()).Index(re) ;
            if (ridx==-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) ;
            }
            if (verbose) {
                std::cout << ".";
                std::cout.flush();
            }
        }
        if (verbose)
            std::cout << std::endl;
        inf.Close() ;
        delete iter ;
    }

}
Revision:	1.1
Committed:	Fri Jan 6 21:28:43 2012 UTC (13 years, 3 months ago) by fgolf
Content type:	text/plain
Branch:	MAIN
Log Message:	histtools
#	User	Rev	Content
1	fgolf	1.1	#include "TCanvas.h"
2			#include "TFile.h"
3			#include "TH1.h"
4			#include "TH2.h"
5			#include "THStack.h"
6			#include "TKey.h"
7			#include "TLegend.h"
8			#include "TRegexp.h"
9			#include "histtools.h"
10			#include <TIterator.h>
11			#include "TClass.h"
12
13			#include <iostream>
14			#include <math.h>
15
16			using namespace std;
17
18			namespace hist {
19
20			void add(const char* outHistName, const char* patORpfx);
21
22			//Add all histograms whose names match one of ten possible regular expression
23			//patterns or begin with one of ten possible given prefixes. Feel free to
24			//mix and match regular expression patterns and prefixes. If the final hist-
25			//ogram named outHistName does not exist it is created.
26
27			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)
28			{
29			add(outHistName, patORpfx0);
30			add(outHistName, patORpfx1);
31			if (patORpfx2) add(outHistName, patORpfx2);
32			if (patORpfx3) add(outHistName, patORpfx3);
33			if (patORpfx4) add(outHistName, patORpfx4);
34			if (patORpfx5) add(outHistName, patORpfx5);
35			if (patORpfx6) add(outHistName, patORpfx6);
36			if (patORpfx7) add(outHistName, patORpfx7);
37			if (patORpfx8) add(outHistName, patORpfx8);
38			if (patORpfx9) add(outHistName, patORpfx9);
39			}
40
41			//Add all histograms whose names match the given regular expression pattern
42			//or begin with the given prefix. If the final histogram named outHistName
43			//does not exist it is created.
44
45			void add(const char* outHistName, const char* patORpfx) {
46			TRegexp reg(patORpfx, kFALSE);
47
48			TList* list = gDirectory->GetList() ;
49			TIterator* iter = list->MakeIterator();
50
51			TObject* obj = 0;
52			TObject* hist = 0;
53			Bool_t makeOutHist = false;
54
55			hist = gDirectory->Get(outHistName);
56			//If out hist does not exist, remember to create it
57			if (! hist) makeOutHist = true;
58
59			while ( (obj = iter->Next()) ) {
60			if (! obj->InheritsFrom(TH1::Class())) continue;
61
62			TString name = obj->GetName();
63			//Don't add out hist
64			if (name == TString(outHistName)) continue;
65
66			if (TString(patORpfx).MaybeRegexp()) {
67			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
68			} else if (! name.BeginsWith(patORpfx)) continue;
69
70			if (makeOutHist) {
71			hist = obj->Clone(outHistName);
72
73			if (hist->InheritsFrom(TH2::Class()))
74			((TH2*)hist)->Reset();
75			else
76			((TH1*)hist)->Reset();
77
78			((TH1*)hist)->SetTitle(outHistName);
79			((TH1*)hist)->Sumw2();
80			makeOutHist = false;
81			}
82
83			((TH1)hist)->Add((TH1)obj);
84			}
85			}
86
87			//For all histograms whose names match the given regular expression pattern
88			//or begin with the given prefix, set the fill, line and marker colors to the
89			//given value.
90
91			void color(const char* patORpfx, Color_t color) {
92			TRegexp reg(patORpfx, kFALSE);
93
94			TList* list = gDirectory->GetList() ;
95			if (!list) {
96			cout << "Failed to set color for " << patORpfx << endl;
97			return;
98			}
99			TIterator* iter = list->MakeIterator();
100
101			TObject* obj = 0;
102
103			while ( (obj = iter->Next()) ) {
104			if (! obj->InheritsFrom(TH1::Class())) continue;
105
106			TString name = obj->GetName();
107
108			if (TString(patORpfx).MaybeRegexp()) {
109			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
110			} else if (! name.BeginsWith(patORpfx)) continue;
111
112			((TH1*)obj)->SetFillColor(color);
113			((TH1*)obj)->SetLineColor(color);
114			((TH1*)obj)->SetMarkerColor(color);
115			}
116			}
117
118			//Return a pointer to a TLegend with an entry for each histogram drawn on a
119			//given TCanvas. Display either the line, point or fill values. Optionally
120			//apply colors to all histograms. By default, entry labels are the names of
121			//their respective histograms. Optionally, if histogram names are of the
122			//form XX_YY_ZZ_WW, entry labels can be XX (token=0), YY (token=1), etc.
123
124			TLegend* legend(TCanvas* canvas, Option_t* option, Bool_t addColor, Int_t token,
125			Float_t xmin, Float_t ymin, Float_t xmax, Float_t ymax) {
126			if(! canvas) return 0;
127
128			TLegend* leg = new TLegend(xmin, ymin, xmax, ymax);
129			TList* list = canvas->GetListOfPrimitives();
130			TIterator* iter = list->MakeIterator();
131
132			TObject* obj = 0;
133
134			//Hist color iterator
135			Int_t colorIt = 1;
136
137			while ( (obj = iter->Next()) ) {
138			if (! obj->InheritsFrom(TH1::Class())) continue;
139
140			if (addColor) {
141			hist::color(obj->GetName(), colorIt);
142			++colorIt;
143			}
144
145			if (token == -1)
146			leg->AddEntry(obj, obj->GetName(), option);
147			else {
148			TString name(obj->GetName());
149			TObjArray* a = name.Tokenize("_");
150			if (a->GetEntries() <= token)
151			leg->AddEntry(obj, obj->GetName(), option);
152			else
153			leg->AddEntry(obj, a->At(token)->GetName(), option);
154			}
155			}
156
157			return leg;
158			}
159
160			//Normalize to one all histograms whose names match the given regular exp-
161			//ression pattern or begin with the given prefix.
162
163			void normalize(const char* patORpfx) {
164			TRegexp reg(patORpfx, kFALSE);
165
166			TList* list = gDirectory->GetList() ;
167			TIterator* iter = list->MakeIterator();
168
169			TObject* obj = 0;
170
171			while ( (obj = iter->Next()) ) {
172			if (! obj->InheritsFrom(TH1::Class())) continue;
173
174			TString name = obj->GetName();
175
176			if (TString(patORpfx).MaybeRegexp()) {
177			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
178			} else if (! name.BeginsWith(patORpfx)) continue;
179
180			Double_t integral = 0;
181
182			if (obj->InheritsFrom(TH2::Class()))
183			integral = ((TH2*)obj)->Integral();
184			else
185			integral = ((TH1*)obj)->Integral();
186
187			if (integral) {
188			((TH1*)obj)->Sumw2();
189			((TH1*)obj)->Scale(1./integral);
190			}
191			}
192			}
193
194			//Scale by the given value all histograms whose names match the given regular
195			//expression pattern or begin with the given prefix.
196
197			void scale(const char* patORpfx, Double_t scale) {
198			TRegexp reg(patORpfx, kFALSE);
199
200			TList* list = gDirectory->GetList() ;
201			TIterator* iter = list->MakeIterator();
202
203			TObject* obj = 0;
204
205			while ( (obj = iter->Next()) ) {
206			if (! obj->InheritsFrom(TH1::Class())) continue;
207
208			TString name = obj->GetName();
209
210			if (TString(patORpfx).MaybeRegexp()) {
211			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
212			} else if (! name.BeginsWith(patORpfx)) continue;
213
214			if (!(((TH1*)obj)->GetSumw2N()))
215			((TH1*)obj)->Sumw2();
216			((TH1*)obj)->Scale(scale);
217			}
218			}
219
220			//Don't you hate it when you draw multiple histograms on the same canvas only
221			//to find that the bottom histogram's range does not encompass those of the
222			//histograms drawn on top? This method determines the maximum and minimum y
223			//range of all the histograms drawn on a given TCanvas and appropriately re-
224			//sizes the bottom histogram.
225
226			void setrangey(TCanvas* canvas) {
227			if(! canvas) return;
228
229			TList* list = canvas->GetListOfPrimitives();
230			TIterator* iter = list->MakeIterator();
231
232			TObject* obj = 0;
233			TObject* top = 0;
234
235			//Extremes
236			Double_t maxy = -999999;
237			Double_t miny = 999999;
238
239			while ( (obj = iter->Next()) ) {
240			if (! obj->InheritsFrom(TH1::Class())) continue;
241
242			if (! top) top = obj;
243
244			if (((TH1)obj)->GetMaximum() > maxy) maxy = ((TH1)obj)->GetMaximum();
245			if (((TH1)obj)->GetMinimum() < miny) miny = ((TH1)obj)->GetMinimum();
246			}
247
248			((TH1)top)->SetMaximum(maxy1.9);
249			//Protect against log scale
250			if (canvas->GetLogy() && ! miny)
251			((TH1*)top)->SetMinimum(1E-4);
252			else
253			((TH1)top)->SetMinimum(miny0.7);
254			}
255
256			//Create a stacked histogram consisting of all histograms whose names match
257			//the given regular expression pattern or begin with the given prefix. If
258			//the THStack named stackHistName does not exist it is created. Optionally
259			//apply colors to all histograms. Set drawOption to "nostack" if you do not
260			//want to stack, to "hist" to display histograms without errors, to "histe"
261			//to display histograms with errors, etc.
262
263			void stack(const char* stackHistName, const char* patORpfx, Bool_t addColor, Option_t* drawOption) {
264			TRegexp reg(patORpfx, kFALSE);
265
266			TList* list = gDirectory->GetList() ;
267			TIterator* iter = list->MakeIterator();
268
269			TObject* obj = 0;
270			TObject* stack = 0;
271			Bool_t makeStackHist = false;
272
273			stack = gDirectory->Get(stackHistName);
274			//If stack hist does not exist, remember to create it
275			if (! stack) makeStackHist = true;
276
277			//Hist color iterator
278			Int_t colorIt = 1;
279
280			while ( (obj = iter->Next()) ) {
281			if (! obj->InheritsFrom(TH1::Class())) continue;
282
283			TString name = obj->GetName();
284
285			if (TString(patORpfx).MaybeRegexp()) {
286			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
287			} else if (! name.BeginsWith(patORpfx)) continue;
288
289			if (makeStackHist) {
290			stack = new THStack(stackHistName, stackHistName);
291			makeStackHist = false;
292			}
293
294			if (addColor) {
295			hist::color(obj->GetName(), colorIt);
296			++colorIt;
297			}
298
299			((THStack)stack)->Add((TH1)obj, drawOption);
300			}
301
302			// Currently breaks .ls
303			//gDirectory->Append(stack);
304			}
305
306			//Set the x-axis title of all histograms whose names match the given regular
307			//expression pattern or begin with the given prefix.
308
309			void xaxis(const char* patORpfx, const char* title) {
310			TRegexp reg(patORpfx, kFALSE);
311
312			TList* list = gDirectory->GetList() ;
313			TIterator* iter = list->MakeIterator();
314
315			TObject* obj = 0;
316
317			while ( (obj = iter->Next()) ) {
318			if (! (obj->InheritsFrom(TH1::Class()) \|\| obj->InheritsFrom(THStack::Class()))) continue;
319
320			TString name = obj->GetName();
321
322			if (TString(patORpfx).MaybeRegexp()) {
323			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
324			} else if (! name.BeginsWith(patORpfx)) continue;
325
326			if (obj->InheritsFrom(TH1::Class()))
327			((TH1*)obj)->GetXaxis()->SetTitle(title);
328			if (obj->InheritsFrom(THStack::Class())) {
329			((THStack*)obj)->Draw();
330			((THStack*)obj)->GetXaxis()->SetTitle(title);
331			}
332			}
333			}
334
335			//Set the y-axis title of all histograms whose names match the given regular
336			//expression pattern or begin with the given prefix.
337
338			void yaxis(const char* patORpfx, const char* title) {
339			TRegexp reg(patORpfx, kFALSE);
340
341			TList* list = gDirectory->GetList() ;
342			TIterator* iter = list->MakeIterator();
343
344			TObject* obj = 0;
345
346			while ( (obj = iter->Next()) ) {
347			if (! (obj->InheritsFrom(TH1::Class()) \|\| obj->InheritsFrom(THStack::Class()))) continue;
348
349			TString name = obj->GetName();
350
351			if (TString(patORpfx).MaybeRegexp()) {
352			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
353			} else if (! name.BeginsWith(patORpfx)) continue;
354
355			if (obj->InheritsFrom(TH1::Class()))
356			((TH1*)obj)->GetYaxis()->SetTitle(title);
357			if (obj->InheritsFrom(THStack::Class())) {
358			((THStack*)obj)->Draw();
359			((THStack*)obj)->GetYaxis()->SetTitle(title);
360			}
361			}
362			}
363
364			// Input: 4 histogram
365			// Output: one histogram which is the BG subtracted efficiency:
366			// h1 : TOTAL NUMBER OF EVENTS, SIGNAL REGION
367			// h2 : NUMBER OF EVENTS THAT PASS, SIGNAL REGION
368			// h3 : TOTAL NUMBER OF EVENTS, SIDE BAND
369			// h4 : NUMBER OF EVENTS THAT PASS, SIDE BAND
370
371
372			TH1F* eff_bg(TH1F* h1, TH1F* h2, TH1F* h3, TH1F* h4, const char* name){
373
374			// first, verify that all histograms have same binning
375			// nx is the number of visible bins
376			// nxtot = nx+2 includes underflow and overflow
377			Int_t nx = h1->GetNbinsX();
378			Int_t nxtot = nx + 2;
379			if (h2->GetNbinsX() != nx) {
380			cout << "Histograms must have same number of bins" << endl;
381			return 0;
382			}
383			if (h3->GetNbinsX() != nx) {
384			cout << "Histograms must have same number of bins" << endl;
385			return 0;
386			}
387			if (h3->GetNbinsX() != nx) {
388			cout << "Histograms must have same number of bins" << endl;
389			return 0;
390			}
391
392			// get the new histogram
393			TH1F* temp = (TH1F*) h1->Clone(name);
394			temp->SetTitle(name);
395			temp->Reset();
396			temp->Sumw2();
397
398			// Loop over bins, calculate efficiency and error, put it in histogram
399			for (Int_t i=0; i<nxtot; i++) {
400			Double_t x1 = h1->GetBinContent(i);
401			Double_t x2 = h2->GetBinContent(i);
402			Double_t x3 = h3->GetBinContent(i);
403			Double_t x4 = h4->GetBinContent(i);
404			Double_t denom = x1 - x3;
405			Double_t eff;
406			if (denom == 0.) {
407			eff = 0;
408			} else {
409			eff = (x2-x4)/denom;
410			}
411			Double_t failSig = x1 - x2;
412			Double_t failBg = x3 - x4;
413			Double_t blah = (1-eff)(1-eff)(x2+x4) + effeff(failSig+failBg);
414			if (blah <= 0.) blah=0.0;
415			Double_t err;
416			if (denom == 0) {
417			err = 0.;
418			} else {
419			err = sqrt(blah)/denom;
420			}
421			temp->SetBinContent(i,eff);
422			temp->SetBinError(i,err);
423			}
424
425			// Done
426			return temp;
427			}
428
429			void deleteHistos() {
430			// Delete all existing histograms in memory
431			TObject* obj;
432			TList* list = gDirectory->GetList() ;
433			TIterator* iter = list->MakeIterator();
434			while ( (obj=iter->Next()) ) {
435			if (obj->IsA()->InheritsFrom(TH1::Class()) \|\|
436			obj->IsA()->InheritsFrom(TH2::Class()) ) {delete obj;}
437			}
438			}
439
440			void histio()
441			{
442			}
443
444			void saveHist(const char* filename, const char* pat)
445			{
446			TList* list = gDirectory->GetList() ;
447			TIterator* iter = list->MakeIterator();
448
449			TRegexp re(pat,kTRUE) ;
450
451			TFile outf(filename,"RECREATE") ;
452			while(TObject *obj=iter->Next()) {
453			if (TString(obj->GetName()).Index(re)>=0) {
454			obj->Write() ;
455			cout << "." ;
456			cout.flush() ;
457			}
458			}
459			cout << endl ;
460			outf.Close() ;
461
462			delete iter ;
463			}
464
465
466			void loadHist(const char* filename, const char* pfx, const char* pat, Bool_t verbose, Bool_t doAdd)
467			{
468			TFile inf(filename) ;
469			//inf.ReadAll() ;
470			TList* list = inf.GetListOfKeys() ;
471			TIterator* iter = list->MakeIterator();
472
473			TRegexp re(pat,kTRUE) ;
474			if (verbose)
475			std::cout << "pat = " << pat << std::endl;
476
477			gDirectory->cd("Rint:") ;
478
479			TObject* obj ;
480			TKey* key ;
481			if (verbose) {
482			std::cout << "doAdd = " << (doAdd?"T":"F") << std::endl;
483			std::cout << "loadHist: reading.";
484			}
485			while( (key=(TKey*)iter->Next()) ) {
486
487			Int_t ridx = TString(key->GetName()).Index(re) ;
488			if (ridx==-1) {
489			continue ;
490			}
491
492			obj = inf.Get(key->GetName()) ;
493			TObject* clone ;
494			if (pfx) {
495
496			// Find existing TH1-derived objects
497			TObject* oldObj = 0 ;
498			if (doAdd){
499			oldObj = gDirectory->Get(Form("%s_%s",pfx,obj->GetName())) ;
500			if (oldObj && !oldObj->IsA()->InheritsFrom(TH1::Class())) {
501			oldObj = 0 ;
502			}
503			}
504			if (oldObj) {
505			clone = oldObj ;
506			((TH1)clone)->Add((TH1)obj) ;
507			} else {
508			clone = obj->Clone(Form("%s_%s",pfx,obj->GetName())) ;
509			}
510
511
512			} else {
513
514			// Find existing TH1-derived objects
515			TObject* oldObj = 0 ;
516			if (doAdd){
517			oldObj = gDirectory->Get(key->GetName()) ;
518			if (oldObj && !oldObj->IsA()->InheritsFrom(TH1::Class())) {
519			oldObj = 0 ;
520			}
521			}
522
523			if (oldObj) {
524			clone = oldObj ;
525			((TH1)clone)->Add((TH1)obj) ;
526			} else {
527			clone = obj->Clone() ;
528			}
529			}
530			if (!gDirectory->GetList()->FindObject(clone)) {
531			gDirectory->Append(clone) ;
532			}
533			if (verbose) {
534			std::cout << ".";
535			std::cout.flush();
536			}
537			}
538			if (verbose)
539			std::cout << std::endl;
540			inf.Close() ;
541			delete iter ;
542			}
543
544			}