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*
Error occurred while calculating annotation data.
Log Message:	replace .C with .cc
#	Content
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
12	#include <iostream>
13
14	using namespace std;
15
16	namespace hist {
17
18	void add(const char* outHistName, const char* patORpfx);
19
20	//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
39	//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
81	((TH1)hist)->Add((TH1)obj);
82	}
83	}
84
85	//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
116	//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
143	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
155	return leg;
156	}
157
158	//Normalize to one all histograms whose names match the given regular exp-
159	//ression pattern or begin with the given prefix.
160
161	void normalize(const char* patORpfx) {
162	TRegexp reg(patORpfx, kFALSE);
163
164	TList* list = gDirectory->GetList() ;
165	TIterator* iter = list->MakeIterator();
166
167	TObject* obj = 0;
168
169	while ( (obj = iter->Next()) ) {
170	if (! obj->InheritsFrom(TH1::Class())) continue;
171
172	TString name = obj->GetName();
173
174	if (TString(patORpfx).MaybeRegexp()) {
175	if (TString(obj->GetName()).Index(reg) < 0 ) continue;
176	} else if (! name.BeginsWith(patORpfx)) continue;
177
178	Double_t integral = 0;
179
180	if (obj->InheritsFrom(TH2::Class()))
181	integral = ((TH2*)obj)->Integral();
182	else
183	integral = ((TH1*)obj)->Integral();
184
185	if (integral) {
186	((TH1*)obj)->Sumw2();
187	((TH1*)obj)->Scale(1./integral);
188	}
189	}
190	}
191
192	//Scale by the given value all histograms whose names match the given regular
193	//expression pattern or begin with the given prefix.
194
195	void scale(const char* patORpfx, Double_t scale) {
196	TRegexp reg(patORpfx, kFALSE);
197
198	TList* list = gDirectory->GetList() ;
199	TIterator* iter = list->MakeIterator();
200
201	TObject* obj = 0;
202
203	while ( (obj = iter->Next()) ) {
204	if (! obj->InheritsFrom(TH1::Class())) continue;
205
206	TString name = obj->GetName();
207
208	if (TString(patORpfx).MaybeRegexp()) {
209	if (TString(obj->GetName()).Index(reg) < 0 ) continue;
210	} else if (! name.BeginsWith(patORpfx)) continue;
211
212	if (!(((TH1*)obj)->GetSumw2N()))
213	((TH1*)obj)->Sumw2();
214	((TH1*)obj)->Scale(scale);
215	}
216	}
217
218	//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
254	//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
292	if (addColor) {
293	hist::color(obj->GetName(), colorIt);
294	++colorIt;
295	}
296
297	((THStack)stack)->Add((TH1)obj, drawOption);
298	}
299
300	// Currently breaks .ls
301	//gDirectory->Append(stack);
302	}
303
304	//Set the x-axis title of all histograms whose names match the given regular
305	//expression pattern or begin with the given prefix.
306
307	void xaxis(const char* patORpfx, const char* title) {
308	TRegexp reg(patORpfx, kFALSE);
309
310	TList* list = gDirectory->GetList() ;
311	TIterator* iter = list->MakeIterator();
312
313	TObject* obj = 0;
314
315	while ( (obj = iter->Next()) ) {
316	if (! (obj->InheritsFrom(TH1::Class()) \|\| obj->InheritsFrom(THStack::Class()))) continue;
317
318	TString name = obj->GetName();
319
320	if (TString(patORpfx).MaybeRegexp()) {
321	if (TString(obj->GetName()).Index(reg) < 0 ) continue;
322	} else if (! name.BeginsWith(patORpfx)) continue;
323
324	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
333	//Set the y-axis title of all histograms whose names match the given regular
334	//expression pattern or begin with the given prefix.
335
336	void yaxis(const char* patORpfx, const char* title) {
337	TRegexp reg(patORpfx, kFALSE);
338
339	TList* list = gDirectory->GetList() ;
340	TIterator* iter = list->MakeIterator();
341
342	TObject* obj = 0;
343
344	while ( (obj = iter->Next()) ) {
345	if (! (obj->InheritsFrom(TH1::Class()) \|\| obj->InheritsFrom(THStack::Class()))) continue;
346
347	TString name = obj->GetName();
348
349	if (TString(patORpfx).MaybeRegexp()) {
350	if (TString(obj->GetName()).Index(reg) < 0 ) continue;
351	} else if (! name.BeginsWith(patORpfx)) continue;
352
353	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
362	// 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
369
370	TH1F* eff_bg(TH1F* h1, TH1F* h2, TH1F* h3, TH1F* h4, const char* name){
371
372	// 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
423	// Done
424	return temp;
425	}
426
427	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
438	void histio()
439	{
440	}
441
442	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
460	delete iter ;
461	}
462
463
464	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
490	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
542	}