FGolf/Tools/histtools.C

#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 <iostream>

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:	1.4
Committed:	Tue Mar 20 19:09:18 2012 UTC (13 years, 1 month ago) by fgolf
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.3:	+0 -0 lines
State:	*FILE REMOVED*
Log Message:	replace .C with .cc
#	User	Rev	Content
1	fgolf	1.2	#include "TCanvas.h"
2			#include "TFile.h"
3	fgolf	1.1	#include "TH1.h"
4			#include "TH2.h"
5	fgolf	1.2	#include "THStack.h"
6			#include "TKey.h"
7	fgolf	1.1	#include "TLegend.h"
8			#include "TRegexp.h"
9	fgolf	1.3	#include "histtools.h"
10			#include <TIterator.h>
11	fgolf	1.2
12	fgolf	1.1	#include <iostream>
13
14	fgolf	1.2	using namespace std;
15
16	fgolf	1.1	namespace hist {
17
18	fgolf	1.3	void add(const char* outHistName, const char* patORpfx);
19	fgolf	1.2
20	fgolf	1.3	//Add all histograms whose names match one of ten possible regular expression
21			//patterns or begin with one of ten possible given prefixes. Feel free to
22			//mix and match regular expression patterns and prefixes. If the final hist-
23			//ogram named outHistName does not exist it is created.
24
25			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)
26			{
27			add(outHistName, patORpfx0);
28			add(outHistName, patORpfx1);
29			if (patORpfx2) add(outHistName, patORpfx2);
30			if (patORpfx3) add(outHistName, patORpfx3);
31			if (patORpfx4) add(outHistName, patORpfx4);
32			if (patORpfx5) add(outHistName, patORpfx5);
33			if (patORpfx6) add(outHistName, patORpfx6);
34			if (patORpfx7) add(outHistName, patORpfx7);
35			if (patORpfx8) add(outHistName, patORpfx8);
36			if (patORpfx9) add(outHistName, patORpfx9);
37			}
38	fgolf	1.1
39	fgolf	1.3	//Add all histograms whose names match the given regular expression pattern
40			//or begin with the given prefix. If the final histogram named outHistName
41			//does not exist it is created.
42
43			void add(const char* outHistName, const char* patORpfx) {
44			TRegexp reg(patORpfx, kFALSE);
45
46			TList* list = gDirectory->GetList() ;
47			TIterator* iter = list->MakeIterator();
48
49			TObject* obj = 0;
50			TObject* hist = 0;
51			Bool_t makeOutHist = false;
52
53			hist = gDirectory->Get(outHistName);
54			//If out hist does not exist, remember to create it
55			if (! hist) makeOutHist = true;
56
57			while ( (obj = iter->Next()) ) {
58			if (! obj->InheritsFrom(TH1::Class())) continue;
59
60			TString name = obj->GetName();
61			//Don't add out hist
62			if (name == TString(outHistName)) continue;
63
64			if (TString(patORpfx).MaybeRegexp()) {
65			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
66			} else if (! name.BeginsWith(patORpfx)) continue;
67
68			if (makeOutHist) {
69			hist = obj->Clone(outHistName);
70
71			if (hist->InheritsFrom(TH2::Class()))
72			((TH2*)hist)->Reset();
73			else
74			((TH1*)hist)->Reset();
75
76			((TH1*)hist)->SetTitle(outHistName);
77			((TH1*)hist)->Sumw2();
78			makeOutHist = false;
79			}
80	fgolf	1.1
81	fgolf	1.3	((TH1)hist)->Add((TH1)obj);
82			}
83			}
84	fgolf	1.1
85	fgolf	1.3	//For all histograms whose names match the given regular expression pattern
86			//or begin with the given prefix, set the fill, line and marker colors to the
87			//given value.
88
89			void color(const char* patORpfx, Color_t color) {
90			TRegexp reg(patORpfx, kFALSE);
91
92			TList* list = gDirectory->GetList() ;
93			if (!list) {
94			cout << "Failed to set color for " << patORpfx << endl;
95			return;
96			}
97			TIterator* iter = list->MakeIterator();
98
99			TObject* obj = 0;
100
101			while ( (obj = iter->Next()) ) {
102			if (! obj->InheritsFrom(TH1::Class())) continue;
103
104			TString name = obj->GetName();
105
106			if (TString(patORpfx).MaybeRegexp()) {
107			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
108			} else if (! name.BeginsWith(patORpfx)) continue;
109
110			((TH1*)obj)->SetFillColor(color);
111			((TH1*)obj)->SetLineColor(color);
112			((TH1*)obj)->SetMarkerColor(color);
113			}
114			}
115	fgolf	1.1
116	fgolf	1.3	//Return a pointer to a TLegend with an entry for each histogram drawn on a
117			//given TCanvas. Display either the line, point or fill values. Optionally
118			//apply colors to all histograms. By default, entry labels are the names of
119			//their respective histograms. Optionally, if histogram names are of the
120			//form XX_YY_ZZ_WW, entry labels can be XX (token=0), YY (token=1), etc.
121
122			TLegend* legend(TCanvas* canvas, Option_t* option, Bool_t addColor, Int_t token,
123			Float_t xmin, Float_t ymin, Float_t xmax, Float_t ymax) {
124			if(! canvas) return 0;
125
126			TLegend* leg = new TLegend(xmin, ymin, xmax, ymax);
127			TList* list = canvas->GetListOfPrimitives();
128			TIterator* iter = list->MakeIterator();
129
130			TObject* obj = 0;
131
132			//Hist color iterator
133			Int_t colorIt = 1;
134
135			while ( (obj = iter->Next()) ) {
136			if (! obj->InheritsFrom(TH1::Class())) continue;
137
138			if (addColor) {
139			hist::color(obj->GetName(), colorIt);
140			++colorIt;
141			}
142	fgolf	1.2
143	fgolf	1.3	if (token == -1)
144			leg->AddEntry(obj, obj->GetName(), option);
145			else {
146			TString name(obj->GetName());
147			TObjArray* a = name.Tokenize("_");
148			if (a->GetEntries() <= token)
149			leg->AddEntry(obj, obj->GetName(), option);
150			else
151			leg->AddEntry(obj, a->At(token)->GetName(), option);
152			}
153			}
154	fgolf	1.2
155	fgolf	1.3	return leg;
156			}
157	fgolf	1.2
158	fgolf	1.3	//Normalize to one all histograms whose names match the given regular exp-
159			//ression pattern or begin with the given prefix.
160	fgolf	1.2
161	fgolf	1.3	void normalize(const char* patORpfx) {
162			TRegexp reg(patORpfx, kFALSE);
163	fgolf	1.2
164	fgolf	1.3	TList* list = gDirectory->GetList() ;
165			TIterator* iter = list->MakeIterator();
166	fgolf	1.2
167	fgolf	1.3	TObject* obj = 0;
168	fgolf	1.1
169	fgolf	1.3	while ( (obj = iter->Next()) ) {
170			if (! obj->InheritsFrom(TH1::Class())) continue;
171	fgolf	1.1
172	fgolf	1.3	TString name = obj->GetName();
173	fgolf	1.1
174	fgolf	1.3	if (TString(patORpfx).MaybeRegexp()) {
175			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
176			} else if (! name.BeginsWith(patORpfx)) continue;
177	fgolf	1.1
178	fgolf	1.3	Double_t integral = 0;
179	fgolf	1.1
180	fgolf	1.3	if (obj->InheritsFrom(TH2::Class()))
181			integral = ((TH2*)obj)->Integral();
182			else
183			integral = ((TH1*)obj)->Integral();
184	fgolf	1.1
185	fgolf	1.3	if (integral) {
186			((TH1*)obj)->Sumw2();
187			((TH1*)obj)->Scale(1./integral);
188			}
189			}
190			}
191	fgolf	1.1
192	fgolf	1.3	//Scale by the given value all histograms whose names match the given regular
193			//expression pattern or begin with the given prefix.
194	fgolf	1.1
195	fgolf	1.3	void scale(const char* patORpfx, Double_t scale) {
196			TRegexp reg(patORpfx, kFALSE);
197	fgolf	1.1
198	fgolf	1.3	TList* list = gDirectory->GetList() ;
199			TIterator* iter = list->MakeIterator();
200	fgolf	1.1
201	fgolf	1.3	TObject* obj = 0;
202	fgolf	1.1
203	fgolf	1.3	while ( (obj = iter->Next()) ) {
204			if (! obj->InheritsFrom(TH1::Class())) continue;
205	fgolf	1.1
206	fgolf	1.3	TString name = obj->GetName();
207	fgolf	1.1
208	fgolf	1.3	if (TString(patORpfx).MaybeRegexp()) {
209			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
210			} else if (! name.BeginsWith(patORpfx)) continue;
211	fgolf	1.1
212	fgolf	1.3	if (!(((TH1*)obj)->GetSumw2N()))
213			((TH1*)obj)->Sumw2();
214			((TH1*)obj)->Scale(scale);
215			}
216			}
217	fgolf	1.1
218	fgolf	1.3	//Don't you hate it when you draw multiple histograms on the same canvas only
219			//to find that the bottom histogram's range does not encompass those of the
220			//histograms drawn on top? This method determines the maximum and minimum y
221			//range of all the histograms drawn on a given TCanvas and appropriately re-
222			//sizes the bottom histogram.
223
224			void setrangey(TCanvas* canvas) {
225			if(! canvas) return;
226
227			TList* list = canvas->GetListOfPrimitives();
228			TIterator* iter = list->MakeIterator();
229
230			TObject* obj = 0;
231			TObject* top = 0;
232
233			//Extremes
234			Double_t maxy = -999999;
235			Double_t miny = 999999;
236
237			while ( (obj = iter->Next()) ) {
238			if (! obj->InheritsFrom(TH1::Class())) continue;
239
240			if (! top) top = obj;
241
242			if (((TH1)obj)->GetMaximum() > maxy) maxy = ((TH1)obj)->GetMaximum();
243			if (((TH1)obj)->GetMinimum() < miny) miny = ((TH1)obj)->GetMinimum();
244			}
245
246			((TH1)top)->SetMaximum(maxy1.9);
247			//Protect against log scale
248			if (canvas->GetLogy() && ! miny)
249			((TH1*)top)->SetMinimum(1E-4);
250			else
251			((TH1)top)->SetMinimum(miny0.7);
252			}
253	fgolf	1.1
254	fgolf	1.3	//Create a stacked histogram consisting of all histograms whose names match
255			//the given regular expression pattern or begin with the given prefix. If
256			//the THStack named stackHistName does not exist it is created. Optionally
257			//apply colors to all histograms. Set drawOption to "nostack" if you do not
258			//want to stack, to "hist" to display histograms without errors, to "histe"
259			//to display histograms with errors, etc.
260
261			void stack(const char* stackHistName, const char* patORpfx, Bool_t addColor, Option_t* drawOption) {
262			TRegexp reg(patORpfx, kFALSE);
263
264			TList* list = gDirectory->GetList() ;
265			TIterator* iter = list->MakeIterator();
266
267			TObject* obj = 0;
268			TObject* stack = 0;
269			Bool_t makeStackHist = false;
270
271			stack = gDirectory->Get(stackHistName);
272			//If stack hist does not exist, remember to create it
273			if (! stack) makeStackHist = true;
274
275			//Hist color iterator
276			Int_t colorIt = 1;
277
278			while ( (obj = iter->Next()) ) {
279			if (! obj->InheritsFrom(TH1::Class())) continue;
280
281			TString name = obj->GetName();
282
283			if (TString(patORpfx).MaybeRegexp()) {
284			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
285			} else if (! name.BeginsWith(patORpfx)) continue;
286
287			if (makeStackHist) {
288			stack = new THStack(stackHistName, stackHistName);
289			makeStackHist = false;
290			}
291	fgolf	1.1
292	fgolf	1.3	if (addColor) {
293			hist::color(obj->GetName(), colorIt);
294			++colorIt;
295			}
296	fgolf	1.1
297	fgolf	1.3	((THStack)stack)->Add((TH1)obj, drawOption);
298			}
299	fgolf	1.1
300	fgolf	1.3	// Currently breaks .ls
301			//gDirectory->Append(stack);
302			}
303	fgolf	1.1
304	fgolf	1.3	//Set the x-axis title of all histograms whose names match the given regular
305			//expression pattern or begin with the given prefix.
306	fgolf	1.2
307	fgolf	1.3	void xaxis(const char* patORpfx, const char* title) {
308			TRegexp reg(patORpfx, kFALSE);
309	fgolf	1.1
310	fgolf	1.3	TList* list = gDirectory->GetList() ;
311			TIterator* iter = list->MakeIterator();
312	fgolf	1.1
313	fgolf	1.3	TObject* obj = 0;
314	fgolf	1.1
315	fgolf	1.3	while ( (obj = iter->Next()) ) {
316			if (! (obj->InheritsFrom(TH1::Class()) \|\| obj->InheritsFrom(THStack::Class()))) continue;
317	fgolf	1.1
318	fgolf	1.3	TString name = obj->GetName();
319	fgolf	1.1
320	fgolf	1.3	if (TString(patORpfx).MaybeRegexp()) {
321			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
322			} else if (! name.BeginsWith(patORpfx)) continue;
323	fgolf	1.1
324	fgolf	1.3	if (obj->InheritsFrom(TH1::Class()))
325			((TH1*)obj)->GetXaxis()->SetTitle(title);
326			if (obj->InheritsFrom(THStack::Class())) {
327			((THStack*)obj)->Draw();
328			((THStack*)obj)->GetXaxis()->SetTitle(title);
329			}
330			}
331			}
332	fgolf	1.1
333	fgolf	1.3	//Set the y-axis title of all histograms whose names match the given regular
334			//expression pattern or begin with the given prefix.
335	fgolf	1.1
336	fgolf	1.3	void yaxis(const char* patORpfx, const char* title) {
337			TRegexp reg(patORpfx, kFALSE);
338	fgolf	1.1
339	fgolf	1.3	TList* list = gDirectory->GetList() ;
340			TIterator* iter = list->MakeIterator();
341	fgolf	1.1
342	fgolf	1.3	TObject* obj = 0;
343	fgolf	1.1
344	fgolf	1.3	while ( (obj = iter->Next()) ) {
345			if (! (obj->InheritsFrom(TH1::Class()) \|\| obj->InheritsFrom(THStack::Class()))) continue;
346	fgolf	1.1
347	fgolf	1.3	TString name = obj->GetName();
348	fgolf	1.1
349	fgolf	1.3	if (TString(patORpfx).MaybeRegexp()) {
350			if (TString(obj->GetName()).Index(reg) < 0 ) continue;
351			} else if (! name.BeginsWith(patORpfx)) continue;
352	fgolf	1.2
353	fgolf	1.3	if (obj->InheritsFrom(TH1::Class()))
354			((TH1*)obj)->GetYaxis()->SetTitle(title);
355			if (obj->InheritsFrom(THStack::Class())) {
356			((THStack*)obj)->Draw();
357			((THStack*)obj)->GetYaxis()->SetTitle(title);
358			}
359			}
360			}
361	fgolf	1.1
362	fgolf	1.2	// Input: 4 histogram
363			// Output: one histogram which is the BG subtracted efficiency:
364			// h1 : TOTAL NUMBER OF EVENTS, SIGNAL REGION
365			// h2 : NUMBER OF EVENTS THAT PASS, SIGNAL REGION
366			// h3 : TOTAL NUMBER OF EVENTS, SIDE BAND
367			// h4 : NUMBER OF EVENTS THAT PASS, SIDE BAND
368	fgolf	1.1
369
370	fgolf	1.3	TH1F* eff_bg(TH1F* h1, TH1F* h2, TH1F* h3, TH1F* h4, const char* name){
371	fgolf	1.1
372	fgolf	1.3	// first, verify that all histograms have same binning
373			// nx is the number of visible bins
374			// nxtot = nx+2 includes underflow and overflow
375			Int_t nx = h1->GetNbinsX();
376			Int_t nxtot = nx + 2;
377			if (h2->GetNbinsX() != nx) {
378			cout << "Histograms must have same number of bins" << endl;
379			return 0;
380			}
381			if (h3->GetNbinsX() != nx) {
382			cout << "Histograms must have same number of bins" << endl;
383			return 0;
384			}
385			if (h3->GetNbinsX() != nx) {
386			cout << "Histograms must have same number of bins" << endl;
387			return 0;
388			}
389
390			// get the new histogram
391			TH1F* temp = (TH1F*) h1->Clone(name);
392			temp->SetTitle(name);
393			temp->Reset();
394			temp->Sumw2();
395
396			// Loop over bins, calculate efficiency and error, put it in histogram
397			for (Int_t i=0; i<nxtot; i++) {
398			Double_t x1 = h1->GetBinContent(i);
399			Double_t x2 = h2->GetBinContent(i);
400			Double_t x3 = h3->GetBinContent(i);
401			Double_t x4 = h4->GetBinContent(i);
402			Double_t denom = x1 - x3;
403			Double_t eff;
404			if (denom == 0.) {
405			eff = 0;
406			} else {
407			eff = (x2-x4)/denom;
408			}
409			Double_t failSig = x1 - x2;
410			Double_t failBg = x3 - x4;
411			Double_t blah = (1-eff)(1-eff)(x2+x4) + effeff(failSig+failBg);
412			if (blah <= 0.) blah=0.0;
413			Double_t err;
414			if (denom == 0) {
415			err = 0.;
416			} else {
417			err = sqrt(blah)/denom;
418			}
419			temp->SetBinContent(i,eff);
420			temp->SetBinError(i,err);
421			}
422	fgolf	1.1
423	fgolf	1.3	// Done
424			return temp;
425			}
426	fgolf	1.1
427	fgolf	1.3	void deleteHistos() {
428			// Delete all existing histograms in memory
429			TObject* obj;
430			TList* list = gDirectory->GetList() ;
431			TIterator* iter = list->MakeIterator();
432			while ( (obj=iter->Next()) ) {
433			if (obj->IsA()->InheritsFrom(TH1::Class()) \|\|
434			obj->IsA()->InheritsFrom(TH2::Class()) ) {delete obj;}
435			}
436			}
437	fgolf	1.1
438	fgolf	1.3	void histio()
439			{
440			}
441	fgolf	1.1
442	fgolf	1.3	void saveHist(const char* filename, const char* pat)
443			{
444			TList* list = gDirectory->GetList() ;
445			TIterator* iter = list->MakeIterator();
446
447			TRegexp re(pat,kTRUE) ;
448
449			TFile outf(filename,"RECREATE") ;
450			while(TObject *obj=iter->Next()) {
451			if (TString(obj->GetName()).Index(re)>=0) {
452			obj->Write() ;
453			cout << "." ;
454			cout.flush() ;
455			}
456			}
457			cout << endl ;
458			outf.Close() ;
459	fgolf	1.2
460	fgolf	1.3	delete iter ;
461			}
462	fgolf	1.1
463
464	fgolf	1.3	void loadHist(const char* filename, const char* pfx, const char* pat, Bool_t verbose, Bool_t doAdd)
465			{
466			TFile inf(filename) ;
467			//inf.ReadAll() ;
468			TList* list = inf.GetListOfKeys() ;
469			TIterator* iter = list->MakeIterator();
470
471			TRegexp re(pat,kTRUE) ;
472			if (verbose)
473			std::cout << "pat = " << pat << std::endl;
474
475			gDirectory->cd("Rint:") ;
476
477			TObject* obj ;
478			TKey* key ;
479			if (verbose) {
480			std::cout << "doAdd = " << (doAdd?"T":"F") << std::endl;
481			std::cout << "loadHist: reading.";
482			}
483			while( (key=(TKey*)iter->Next()) ) {
484
485			Int_t ridx = TString(key->GetName()).Index(re) ;
486			if (ridx==-1) {
487			continue ;
488			}
489	fgolf	1.1
490	fgolf	1.3	obj = inf.Get(key->GetName()) ;
491			TObject* clone ;
492			if (pfx) {
493
494			// Find existing TH1-derived objects
495			TObject* oldObj = 0 ;
496			if (doAdd){
497			oldObj = gDirectory->Get(Form("%s_%s",pfx,obj->GetName())) ;
498			if (oldObj && !oldObj->IsA()->InheritsFrom(TH1::Class())) {
499			oldObj = 0 ;
500			}
501			}
502			if (oldObj) {
503			clone = oldObj ;
504			((TH1)clone)->Add((TH1)obj) ;
505			} else {
506			clone = obj->Clone(Form("%s_%s",pfx,obj->GetName())) ;
507			}
508
509
510			} else {
511
512			// Find existing TH1-derived objects
513			TObject* oldObj = 0 ;
514			if (doAdd){
515			oldObj = gDirectory->Get(key->GetName()) ;
516			if (oldObj && !oldObj->IsA()->InheritsFrom(TH1::Class())) {
517			oldObj = 0 ;
518			}
519			}
520
521			if (oldObj) {
522			clone = oldObj ;
523			((TH1)clone)->Add((TH1)obj) ;
524			} else {
525			clone = obj->Clone() ;
526			}
527			}
528			if (!gDirectory->GetList()->FindObject(clone)) {
529			gDirectory->Append(clone) ;
530			}
531			if (verbose) {
532			std::cout << ".";
533			std::cout.flush();
534			}
535			}
536			if (verbose)
537			std::cout << std::endl;
538			inf.Close() ;
539			delete iter ;
540			}
541	fgolf	1.1
542			}