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SPlotter.cxx
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#include <iostream>
#include <iomanip>
#include <TObjArray.h>
#include <TObjString.h>
#include <TStyle.h>
#include <TFile.h>
#include <TROOT.h>
#include <TRandom3.h>
#include <TPaveText.h>
#include <TLegend.h>
#include <TLegendEntry.h>
#include <TLatex.h>
#include <TEllipse.h>
#include <TF1.h>
#include <TGraphAsymmErrors.h>
#include <TMath.h>
#include <TColor.h>
#include "SPlotter.h"
using namespace std;
SPlotter::SPlotter()
{
m_can = NULL;
m_ps = NULL;
m_ps_name = "default.ps";
m_pad1 = NULL;
m_pad2 = NULL;
m_rp1_top = NULL;
m_rp1 = NULL;
m_rp2_top = NULL;
m_rp2 = NULL;
m_page = 0;
m_lumi = 0;
m_syserr = -1;
debug = false;
bShapeNorm = false;
bPortrait = true;
bDrawEntries = false;
bDrawLumi = true;
bForPrelim = false;
bForPublication = false;
bDrawLegend = true;
bPlotRatio = false;
bZScoreInRatio = false;
bSingleEPS = false;
need_update = true;
bPlotLogy = false;
bIgnoreEmptyBins = false;
}
SPlotter::~SPlotter()
{
Cleanup();
}
void SPlotter::SetPsFilename(TString name)
{
if (!name.EndsWith(".ps")){
cerr << "SPlotter::SetPsFilename, given filename: " << name
<< " does not end with .ps, intention? Please correct steering." << endl;
exit(EXIT_FAILURE);
}
m_ps_name = name;
}
void SPlotter::DoStacking(vector<TObjArray*>& hists, TObjArray* StackNames, bool rename)
{
if (hists.size()==0){
cerr << "SPlotter::DoStacking: Empty array of histograms. Aborting." << endl;
exit(EXIT_FAILURE);
}
if (!StackNames){ // trivial case: do nothing
return;
}
// loop over all histogram arrays
int narr = hists.size();
for (int i=narr-1; i>=0; --i){
TObjArray* ha = hists[i];
if (ha->GetEntries()<1) continue;
TString proc = ((SHist*)ha->At(0))->GetProcessName();
if (debug) cout << "SPlotter::DoStacking, hist array = " << i
<< " process name = " << proc << endl;
// loop over all stack-names
for (int j=0; j<StackNames->GetEntries(); ++j){
TString sname = ((TObjString*)StackNames->At(j))->GetString();
if (debug) cout << " stack name = " << sname << endl;
if (proc.Contains(sname)){
if (debug) cout << " -> found match, stacking this array." << endl;
StackHists(hists, i, rename);
break;
}
}
}
if (debug) cout << "SPlotter::DoStacking: Done." << endl;
return;
}
void SPlotter::StackHists(std::vector<TObjArray*>& hists, int index, bool rename)
{
// stack histograms at position 'index' with an existing array of stacks
// in hists
// if the stacks don't exist, they are created and added to the array
// get the stack (create a new one if it doesn't exist yet)
TObjArray* stacks = GetStacks(hists, index);
// add the histograms at 'index' to the stack
for (int i=0; i<stacks->GetEntries(); ++i){
SHist* stack = (SHist*)stacks->At(i);
SHist* hist = (SHist*)hists[index]->At(i);
if (!stack || !hist){
cerr << "SPlotter::StackHists: stack or hist at position " << i
<< " does not exist! Abort." << endl;
cerr << "index of hists = " << hists.size() << " histograms = " << hists[index]->GetEntries() << endl;
exit(EXIT_FAILURE);
}
// sanity check: compare names
TString stackname = stack->GetStack()->GetName();
TString histname = hist->GetHist()->GetName();
if (!stackname.Contains(histname)){
cerr << "SPlotter::StackHists: incompatible histograms at position " << i
<< ", stackname = " << stackname << " histname = " << histname
<< ". Prefer to exit because of consistency." << endl;
exit(EXIT_FAILURE);
}
// still here? do the stackin'!
hist->GetHist()->SetFillColor(hist->GetHist()->GetLineColor());
hist->GetHist()->SetFillStyle(1001);
if (rename){
TString pname = hist->GetProcessName();
hist->SetName(histname + "__" + pname);
}
stack->GetStack()->Add(hist->GetHist());
stack->GetStack()->SetTitle(hist->GetHist()->GetTitle());
hist->SetIsUsedInStack(true);
hist->SetDoDraw(false);
stack->SetUnc(hist->GetUnc(), stack->GetStack()->GetHists()->GetSize()-1);
if (debug) cout << "stacking hist " << histname << " on " << stackname << " for process " << hist->GetProcessName()
<< " (dir = " << stack->GetDir() << ")" << endl;
if (i==0){
cout << "stacking process " << hist->GetProcessName() << " with weight " << hist->GetWeight() << " and uncertainty " << hist->GetUnc() << endl;
}
}
return;
}
TObjArray* SPlotter::GetStacks(std::vector<TObjArray*>& hists, int index)
{
// get the array of stacks from the input hists
// if it doesn't exist, a new array will be created if index>0
// and the hists at position 'index' will be used as blue-print
// try to find a stack in the array
TObjArray* arr = NULL;
int narr = hists.size();
for (int i=0; i<narr; ++i){
if (hists[i]->GetEntries()==0){
cerr << "SPlotter::GetStacks: Got no histograms in array " << i
<< " unexpected behaviour - abort." << endl;
exit(EXIT_FAILURE);
}
arr = hists[i];
SHist* sh = (SHist*) arr->At(0);
if (sh->IsStack()){
if (debug) cout << "SPlotter::GetStacks: Found stack at position " << i << endl;
return arr;
}
}
// no stack found, create a new array with THStacks -> use position 'index'
// in the array as a blue-print
if (index>-1){
if (debug) cout << "SPlotter::GetStacks: Creating new array of THStacks "
<< "using position " << index << " as blueprint." << endl;
if (index>narr){
cerr << "SPlotter::GetStacks: Can not create an array of stacks from array"
<< " index " << index << ", since size is only " << hists.size()
<< ". Unexpected behaviour - abort." << endl;
exit(EXIT_FAILURE);
}
arr = new TObjArray();
for (int i=0; i<hists[index]->GetEntries();++i){
TString hname = ((SHist*)hists[index]->At(i))->GetHist()->GetName();
TString name = hname + "_stack";
THStack* st = new THStack(name, "");
SHist* sh = new SHist(st);
sh->SetDir(((SHist*)hists[index]->At(i))->GetDir());
sh->SetProcessName("SM");
sh->SetDoDraw(true);
arr->Add(sh);
if (debug) cout << "SPlotter::GetStacks: Adding stack with name " << name
<< " in directory " << sh->GetDir() << " at position " << i << endl;
}
hists.push_back(arr);
if (debug) cout << "SPlotter::GetStacks: Added stack array to collection. "
<< "New size = " << hists.size() << ", old = " << narr << endl;
}
return arr;
}
void SPlotter::CopyStyle(TH1& h1, TH1* h2)
{
// copy the style from hist2 to hist1
h1.SetMarkerStyle(h2->GetMarkerStyle());
h1.SetMarkerSize(h2->GetMarkerSize());
h1.SetMarkerColor(h2->GetMarkerColor());
h1.SetLineWidth(h2->GetLineWidth());
h1.SetLineStyle(h2->GetLineStyle());
h1.SetLineColor(h2->GetLineColor());
h1.SetFillColor(h2->GetFillColor());
return;
}
void SPlotter::SetupGlobalStyle()
{
// general appearance and style
gROOT->SetStyle("Plain");
gStyle->SetOptStat(0);
gStyle -> SetPadTickX(1);
gStyle -> SetPadTickY(1);
gStyle->SetPadBorderMode(0);
gStyle->SetPadColor(kWhite);
gStyle->SetPadGridX(false);
gStyle->SetPadGridY(false);
gStyle->SetGridColor(0);
gStyle->SetGridStyle(3);
gStyle->SetGridWidth(1);
gStyle->SetFrameBorderMode(0);
gStyle->SetFrameBorderSize(1);
gStyle->SetFrameFillColor(0);
gStyle->SetFrameFillStyle(0);
gStyle->SetFrameLineColor(1);
gStyle->SetFrameLineStyle(1);
gStyle->SetFrameLineWidth(1);
gStyle->SetTitleFont(42, "XYZ");
gStyle->SetLabelFont(42, "XYZ");
gStyle->SetAxisColor(1, "XYZ");
gStyle->SetStripDecimals(kTRUE);
gStyle->SetTickLength(0.03, "XYZ");
gStyle->SetNdivisions(510, "XYZ");
gStyle->UseCurrentStyle();
}
void SPlotter::Cleanup()
{
// do what the name suggests
ClosePostscript();
if (m_can){
delete m_can;
m_can = NULL;
}
}
void SPlotter::SetupCanvas()
{
// set up a canvas, different possibilities
// to take into account portrait/landscape
// and ratio/no ratio plots
Int_t CanWidth;
Int_t CanHeight;
if (bPortrait){
CanWidth = 600;
CanHeight = 830;
} else {
CanWidth = 800;
CanHeight = 600;
}
// set up the canvas
m_can = new TCanvas("canvas","Control Plots", CanWidth, CanHeight);
Float_t yplot = 0.3;
Float_t yratio = 0.17;
// coordinates:
//
// set up the coordinates of the two pads: // y6 +-------------+
Float_t y1, y2, y3, y4, y5, y6; // | |
y6 = 0.97; // | pad1 |
y5 = y6-yplot; // y5 |-------------|
y4 = y5-yratio; // | rp1 |
y3 = 0.49; // y4 +-------------+
y2 = y3-yplot; //
y1 = y2-yratio; // y3 +-------------+
Float_t x1, x2; // | |
x1 = 0.01; // | pad2 |
x2 = 0.99; // y2 |-------------|
// | rp2 |
// y1 +-------------+
// x1 x2
m_rp1_top = new TPad("pad1", "Control Plots 1", x1, y5, x2, y6);
m_rp1 = new TPad("rp1", "Ratio1", x1, y4, x2, y5);
m_rp2_top = new TPad("pad2", "Control Plots 2", x1, y2, x2, y3);
m_rp2 = new TPad("rp2", "Ratio2", x1, y1, x2, y2);
m_pad1 = new TPad("pad1", "Control Plots 1", x1, y4, x2, y6);
m_pad2 = new TPad("pad2", "Control Plots 2", x1, y1, x2, y3);
// set margins for portrait mode
if (bPortrait){
m_pad1->SetTopMargin(0.05); m_pad1->SetBottomMargin(0.16); m_pad1->SetLeftMargin(0.19); m_pad1->SetRightMargin(0.05);
m_pad2->SetTopMargin(0.05); m_pad2->SetBottomMargin(0.16); m_pad2->SetLeftMargin(0.19); m_pad2->SetRightMargin(0.05);
m_rp1_top->SetTopMargin(0.065); m_rp1_top->SetBottomMargin(0.0); m_rp1_top->SetLeftMargin(0.19); m_rp1_top->SetRightMargin(0.05);
m_rp2_top->SetTopMargin(0.065); m_rp2_top->SetBottomMargin(0.0); m_rp2_top->SetLeftMargin(0.19); m_rp2_top->SetRightMargin(0.05);
m_rp1->SetTopMargin(0.0); m_rp1->SetBottomMargin(0.35); m_rp1->SetLeftMargin(0.19); m_rp1->SetRightMargin(0.05);
m_rp2->SetTopMargin(0.0); m_rp2->SetBottomMargin(0.35); m_rp2->SetLeftMargin(0.19); m_rp2->SetRightMargin(0.05);
// margins for landscape
} else {
m_rp1_top->SetTopMargin(0.065); m_rp1_top->SetBottomMargin(0.0); m_rp1_top->SetLeftMargin(0.13); m_rp1_top->SetRightMargin(0.05);
m_rp2_top->SetTopMargin(0.065); m_rp2_top->SetBottomMargin(0.0); m_rp2_top->SetLeftMargin(0.13); m_rp2_top->SetRightMargin(0.05);
if (bPlotRatio){
m_rp1->SetTopMargin(0.0); m_rp1->SetBottomMargin(0.35); m_rp1->SetLeftMargin(0.13); m_rp1->SetRightMargin(0.05);
m_rp2->SetTopMargin(0.0); m_rp2->SetBottomMargin(0.35); m_rp2->SetLeftMargin(0.13); m_rp2->SetRightMargin(0.05);
}
}
if (debug){
m_rp1_top->SetFillColor(kYellow);
m_rp2_top->SetFillColor(kOrange);
if (bPlotRatio){
m_rp1->SetFillColor(kGray);
m_rp2->SetFillColor(kGray);
}
}
m_pad1->Draw();
m_pad2->Draw();
m_rp1_top->Draw();
m_rp2_top->Draw();
if (bPlotRatio){
m_rp1->Draw();
m_rp2->Draw();
}
return;
}
void SPlotter::SetupCanvasForEPS()
{
// set up a canvas for single EPS files
// optimised plots for including in theses or publications and documents
// different possibilities
// ratio/no ratio plots
Int_t CanWidth;
Int_t CanHeight;
CanWidth = 400;
CanHeight = 400;
// set up the canvas
m_can = new TCanvas("canvas","Control Plots", CanWidth, CanHeight);
Float_t yplot = 0.65;
Float_t yratio = 0.34;
// coordinates:
// set up the coordinates of the two pads: //
Float_t y1, y2, y3; // y3 +-------------+
y3 = 0.99; // | |
y2 = y3-yplot; // | pad1 |
y1 = y2-yratio; // y2 |-------------|
Float_t x1, x2; // | rp1 |
x1 = 0.01; // y1 +-------------+
x2 = 0.99; // x1 x2
//
// No Pad 2!
m_rp1_top = new TPad("pad1", "Control Plots 2", x1, y2, x2, y3);
m_rp1 = new TPad("rp1", "Ratio2", x1, y1, x2, y2);
m_pad1 = new TPad("pad1", "Control Plots 2", x1, y1, x2, y3);
m_rp2_top = new TPad("pad1", "Control Plots 2", x1, y2, x2, y3);
m_rp2 = new TPad("rp1", "Ratio2", x1, y1, x2, y2);
m_pad2 = new TPad("pad1", "Control Plots 2", x1, y1, x2, y3);
m_pad1->SetTopMargin(0.05); m_pad1->SetBottomMargin(0.16); m_pad1->SetLeftMargin(0.19); m_pad1->SetRightMargin(0.05);
m_pad2->SetTopMargin(0.05); m_pad2->SetBottomMargin(0.16); m_pad2->SetLeftMargin(0.19); m_pad2->SetRightMargin(0.05);
m_rp1_top->SetTopMargin(0.065); m_rp1_top->SetBottomMargin(0.0); m_rp1_top->SetLeftMargin(0.19); m_rp1_top->SetRightMargin(0.05);
m_rp2_top->SetTopMargin(0.065); m_rp2_top->SetBottomMargin(0.0); m_rp2_top->SetLeftMargin(0.19); m_rp2_top->SetRightMargin(0.05);
m_rp1->SetTopMargin(0.0); m_rp1->SetBottomMargin(0.35); m_rp1->SetLeftMargin(0.19); m_rp1->SetRightMargin(0.05);
m_rp2->SetTopMargin(0.0); m_rp2->SetBottomMargin(0.35); m_rp2->SetLeftMargin(0.19); m_rp2->SetRightMargin(0.05);
if (debug){
m_rp1_top->SetFillColor(kYellow);
m_rp2_top->SetFillColor(kOrange);
if (bPlotRatio){
m_rp1->SetFillColor(kGray);
m_rp2->SetFillColor(kGray);
}
}
m_pad1->Draw();
m_pad2->Draw();
m_rp1_top->Draw();
m_rp2_top->Draw();
if (bPlotRatio){
m_rp1->Draw();
m_rp2->Draw();
}
return;
}
void SPlotter::OpenPostscript(TString dir, TString hname)
{
// create a new ps file with the directory in the name
// optional: for EPS files add the name of the histogram
TString filename(m_ps_name);
filename.ReplaceAll(".ps","");
filename.Append("_");
filename.Append(dir);
filename.Append(".ps");
if (bSingleEPS){
filename.ReplaceAll(".ps","");
filename.Append("_");
filename.Append(hname);
filename.Append(".eps");
} else {
TString text(dir);
text.Prepend("Plotting all histograms in directory ");
cout << "\n+-------------------------- SFrame Plotter ---------------------------+" << endl;
cout << "| " << setw(60)<< text << " |" << endl;
cout << "+---------------------------------------------------------------------+" << endl;
m_page = 0;
}
m_ps = NULL;
if (bSingleEPS){
m_ps = new TPostScript(filename, 113); // eps output
} else {
if (bPortrait){
m_ps = new TPostScript(filename, 111); // ps output
m_ps->Range(20.0, 30.0);
} else {
m_ps = new TPostScript(filename, 112); // ps output
m_ps->Range(27.0, 18.0);
}
}
}
void SPlotter::ClosePostscript()
{
// close the ps file and set page number to 0
if (m_ps){
m_ps->Close();
delete m_ps;
m_ps = NULL;
}
m_page = 0;
}
void SPlotter::ProcessAndPlot(std::vector<TObjArray*> histarr)
{
// loop over all arrays in the input array and plot them
if (histarr.size()<1){
cerr << "SPlotter::ProcessAndPlot: No arrays of histograms given. Abort." << endl;
exit(EXIT_FAILURE);
}
if (histarr[0]->GetEntries()<1){
cerr << "SPlotter::ProcessAndPlot: No histograms given. Abort." << endl;
exit(EXIT_FAILURE);
}
if (bPlotRatio && histarr.size()==1){
cerr << "SPlotter::ProcessAndPlot: Only one process given, can not plot "
<< " ratio. Steering correct?" << endl;
exit(EXIT_FAILURE);
}
SetupGlobalStyle();
TString psname = m_ps_name;
TString current_dir = "";
// loop over all histograms and plot them!
int iplot = 1;
bool bleg = true;
for (int i=0; i<histarr[0]->GetEntries(); ++i){
// get the histograms for the different processes
vector<SHist*> hists = GetPlottableHists(histarr, i);
// no plottable hists found at position i
if (debug) cout << "Number of plottable hists at index " << i << " = " << hists.size() << endl;
if (hists.size()==0) continue;
if (bShapeNorm) ShapeNormalise(hists);
int ipad = GetCurrentPad(iplot);
if (debug) cout << "Plotting histograms " << hists[0]->GetName()
<< " iplot = " << iplot << " ipad = " << ipad << endl;
// new directory? create new ps file for ps-book!
if (!bSingleEPS){
TString dir = hists[0]->GetDir();
if (dir.CompareTo(current_dir)!=0){
if (iplot!=1) DrawPageNum();
Cleanup();
SetupCanvas();
OpenPostscript(dir);
current_dir = dir;
iplot = 1;
ipad = 1;
bleg = true;
}
// new page every second plot
if (iplot%2==1){
if (debug) cout << "Creating new page with number " << m_page << endl;
DrawPageNum();
if (need_update) m_can->Update();
m_ps->NewPage();
++m_page;
}
// new file for each plot in single EPS mode
} else {
TString dir = hists[0]->GetDir();
TString hname = hists[0]->GetName();
Cleanup();
SetupCanvasForEPS();
if (debug) cout << "Creating new eps file with name " << dir << "_" << hname << endl;
OpenPostscript(dir, hname);
current_dir = dir;
iplot = 1;
bleg = true;
}
// cosmetics
DoCosmetics(hists);
// ---------- do what we set out to do: plot! ----------------
if (hists[0]->IsYieldPlot()){ // special treatment for lumi yield plot
PlotLumiYield(hists[0], ipad);
} else { // usual plots
PlotHists(hists, ipad);
// draw a legend
if (bleg){
DrawLegend(GetHistsAtIndex(histarr, i));
if (!bDrawLegend) bleg = false;
}
// draw lumi information
if (bDrawLumi) DrawLumi();
// draw the ratio
if (bPlotRatio){
if (bZScoreInRatio) PlotZScore(hists, ipad);
else PlotRatios(hists, ipad);
}
}
++iplot;
}
// done!
if (!bSingleEPS) DrawPageNum();
if (need_update) m_can->Update();
Cleanup();
}
void SPlotter::PlotLumiYield(SHist* hist, int ipad)
{
// plot the lumi yield histogram
if (ipad==1) m_pad1->cd();
if (ipad==2) m_pad2->cd();
hist->Draw();
// calculate the average
TH1* h = hist->GetHist();
double sum=0;
int bins=0;
for (int i=1; i<h->GetNbinsX()+1; ++i){
if (h->GetBinContent(i)>0){
sum += h->GetBinContent(i);
bins++;
}
}
double av = sum / bins;
// calculate average with outlier-rejection (4sigma)
sum=0;
bins=0;
for (int i=1; i<h->GetNbinsX()+1; ++i){
if (h->GetBinContent(i)>0){
double dev = TMath::Abs( (h->GetBinContent(i) - av)/h->GetBinError(i) );
if (dev<4){
sum += h->GetBinContent(i);
bins++;
} else {
cout << "Lumi yield: outlier in bin " << i << " with content " << h->GetBinContent(i) << " average = " << av << endl;
}
}
}
av = sum / bins;
// calculate error on mean and chi2
double dev = 0;
double chi2 = 0;
for (int i=1; i<h->GetNbinsX()+1; ++i){
if (h->GetBinContent(i)>0){
double pull = (h->GetBinContent(i) - av)/h->GetBinError(i);
if (TMath::Abs(pull)<4){
dev += TMath::Power(h->GetBinContent(i)-av, 2);
chi2 += pull*pull;
}
}
}
double err = TMath::Sqrt(dev/bins);
// highlight points with deviations of more than 3, 4 and 5 sigma
double xr = h->GetXaxis()->GetXmax() - h->GetXaxis()->GetXmin();
double wi = gPad->GetAbsWNDC() * (1 - gPad->GetLeftMargin() - gPad->GetRightMargin());
double he = gPad->GetAbsHNDC() * (1 - gPad->GetTopMargin() - gPad->GetBottomMargin());
double ar = wi/he;
double fudge = 1.;
if (bSingleEPS) fudge = 1.2;
double r1 = 0.02*xr*fudge;
double yr = h->GetMaximum()-h->GetMinimum();
double r2 = 0.016*yr*ar*fudge;
for (int i=1; i<h->GetNbinsX()+1; ++i){
if (h->GetBinContent(i)>0){
double pull = (h->GetBinContent(i) - av)/h->GetBinError(i);
if (TMath::Abs(pull)>5){
TEllipse* circ = new TEllipse(h->GetXaxis()->GetBinCenter(i), h->GetBinContent(i), r1, r2);
circ->SetFillColor(kWhite);
circ->SetLineColor(kRed);
circ->Draw();
} else if (TMath::Abs(pull)>4){
TEllipse* circ = new TEllipse(h->GetXaxis()->GetBinCenter(i), h->GetBinContent(i), r1, r2);
circ->SetFillColor(kWhite);
circ->SetLineColor(kOrange);
circ->Draw();
} else if (TMath::Abs(pull)>3){
TEllipse* circ = new TEllipse(h->GetXaxis()->GetBinCenter(i), h->GetBinContent(i), r1, r2);
circ->SetFillColor(kWhite);
circ->SetLineColor(kSpring);
circ->Draw();
}
}
}
// draw the average
TF1* f = new TF1("average", "[0]", h->GetXaxis()->GetXmin(), h->GetXaxis()->GetXmax());
f->SetLineColor(kAzure+1);
f->SetLineWidth(1);
f->SetParameter(0, av);
f->Draw("same");
TF1* fup = new TF1("up", "[0]", h->GetXaxis()->GetXmin(), h->GetXaxis()->GetXmax());
TF1* fdown = new TF1("down", "[0]", h->GetXaxis()->GetXmin(), h->GetXaxis()->GetXmax());
fup->SetParameter(0, av+err);
fdown->SetParameter(0, av-err);
fup->SetLineColor(kAzure+1);
fdown->SetLineColor(kAzure+1);
fup->SetLineWidth(1);
fdown->SetLineWidth(1);
fup->SetLineStyle(kDashed);
fdown->SetLineStyle(kDashed);
fup->Draw("same");
fdown->Draw("same");
TLatex* text = new TLatex();
text->SetTextFont(42);
text->SetNDC();
text->SetTextColor(kBlack);
text->SetTextSize(0.05);
if (bSingleEPS) text->SetTextSize(0.04);
text->SetTextAlign(11);
TString info = TString::Format("#chi^{2} / ndf");
text->DrawLatex(0.5, 0.30, info.Data());
info = TString::Format("%3.1f / %d", chi2, bins-1);
text->DrawLatex(0.65, 0.30, info.Data());
info = TString::Format("average");
text->DrawLatex(0.5, 0.23, info.Data());
info = TString::Format("%4.1f #pm %4.1f", av, err);
text->DrawLatex(0.65, 0.23, info.Data());
hist->Draw("same");
return;
}
void SPlotter::PlotHists(vector<SHist*> hists, int ipad)
{
// plot all histograms in the array
if (ipad==1){
if (bPlotRatio) m_rp1_top->cd();
else m_pad1->cd();
}
if (ipad==2){
if (bPlotRatio) m_rp2_top->cd();
else m_pad2->cd();
}
bool isok = SetMinMax(hists);
if (isok) SetLogAxes(hists);
// first get some basic histograms
SHist* sstack = SelStack(hists);
SHist* sdata = SelData(hists);
// first, draw data if it exists
int ndrawn = 0;
if (sdata){
sdata->Draw();
++ndrawn;
}
if (debug){
if (sdata){
cout << "\nHist name = " << sdata->GetName() << " process = " << sdata->GetProcessName() << endl;
cout << "hists, entries = " << hists.size() << endl;
cout << "Data entries = " << sdata->GetHist()->Integral() << endl;
}
if (sstack){
double stack_entries = 0;
TObjArray* arr = sstack->GetStack()->GetStack();
TH1* h = (TH1*)arr->At(arr->GetEntries()-1);
stack_entries = h->Integral();
cout << "Stack entries = " << stack_entries << endl;
TList* hists = sstack->GetStack()->GetHists();
// calculate individual area
for (int i=0; i<hists->GetSize(); ++i){
TH1* h = (TH1*) hists->At(i);
int iend = h->GetNbinsX();
double area = h->Integral(1,iend);
cout << " entries of histogram " << i << " in stack = " << area << endl;
}
}
}
// first round
int nh = hists.size();
for (int i=0; i<nh; ++i){
SHist* sh = hists[i];
if (sh->IsStack()) continue;
if (sh==sdata) continue;
if (ndrawn==0) sh->Draw();
else sh->Draw("same");
++ndrawn;
}
// now draw the stack
if (sstack){
if (ndrawn==0){
sstack->Draw();
StackCosmetics(sstack->GetStack());
gPad->Update();
need_update = false;
} else {
sstack->Draw("same");
}
}
// second round
for (int i=0; i<nh; ++i){
SHist* sh = hists[i];
if (sh->IsStack()) continue;
if (sh==sdata) continue;
sh->Draw("same");
}
// draw normalisation error if it is given
if (sstack){
DrawSysError(sstack);
}
// draw data on top
if (sdata) sdata->Draw("same");
gPad->RedrawAxis();
}
void SPlotter::DrawSysError(SHist* stack)
{
// plot an error band corresponding to the overall
// systematic error
// if a theta file is used as input with shape variations,
// also the error from those is drawn
TH1* h = (TH1*) stack->GetStack()->GetStack()->At( stack->GetStack()->GetStack()->GetEntries()-1 );
//TH1* e = (TH1*) h->Clone();
TGraphAsymmErrors* eAsym = new TGraphAsymmErrors();
for (Int_t i=1; i<h->GetNbinsX()+1; ++i){
Double_t sys = 0;
if (m_syserr>0) sys = m_syserr*h->GetBinContent(i);
Double_t stat = h->GetBinError(i);
Double_t norm_err = CalcNormErrorForBin(stack, i);
Double_t sys_err_plus = CalcShapeSysErrorForBinFromTheta(stack, i, "plus");
Double_t sys_err_minus = CalcShapeSysErrorForBinFromTheta(stack, i, "minus");
Double_t ey_low = TMath::Sqrt(norm_err*norm_err + sys*sys + stat*stat + sys_err_minus*sys_err_minus);
Double_t ey_up = TMath::Sqrt(norm_err*norm_err + sys*sys + stat*stat + sys_err_plus*sys_err_plus);
Double_t ex_low = (h->GetXaxis()->GetBinCenter(i)) - (h->GetXaxis()->GetBinLowEdge(i));
Double_t ex_up = (h->GetXaxis()->GetBinUpEdge(i))-h->GetXaxis()->GetBinCenter(i);
eAsym -> SetPoint(i, h->GetXaxis()->GetBinCenter(i), h->GetBinContent(i));
eAsym -> SetPointError(i, ex_low, ex_up, ey_low, ey_up);
}
static Int_t LightGray = TColor::GetColor( "#aaaaaa" );
//h->SetFillColor(kGray+2);
eAsym->SetFillColor(LightGray);
eAsym->SetLineWidth(1);
eAsym->SetFillStyle(3245);
eAsym->Draw("E2 same");
}
double SPlotter::CalcNormErrorForBin(SHist* stack, int ibin)
{
// calculate the normalisation uncertainty of a single bin in the stack
// due to normalisation uncertainty on different processes
double err = 0;
double err2 = 0;
for (int i=0; i<stack->GetStack()->GetStack()->GetEntries(); ++i){
TH1* h = (TH1*) stack->GetStack()->GetHists()->At(i);
double ei = h->GetBinContent(ibin)*stack->GetUnc(i);
err2 += ei*ei;
}
err = TMath::Sqrt(err2);
return err;
}
double SPlotter::CalcShapeSysErrorForBinFromTheta(SHist* stack, int ibin, TString sign)
{
double absoluteerr = 0;
double squarederr = 0;
double err = 0;
if (m_shapesys_arr.size()==0)//no systamtics given in theta file
return err;
if (sign!="plus" && sign!="minus"){
cout << "error in call to CalcShapeSysErrorForBinFromTheta: sign can only be 'plus' or 'minus', no systematic error will be calculated" << endl;
return err;
}
// loop over all background samples to find the process
for (int i=0; i<stack->GetStack()->GetStack()->GetEntries(); ++i){
TH1* h = (TH1*) stack->GetStack()->GetHists()->At(i);
TString histname = h->GetName(); //e.g. HT__QCD
histname.ReplaceAll("__", "#");
TObjArray* histnamePieces = histname.Tokenize("#");
TString variableName = ((TObjString*)histnamePieces->At(0))-> GetString(); //this is the sample name e.g. HT
TString sampleName = ((TObjString*)histnamePieces->At(1))-> GetString(); //this is the sample name e.g. QCD or TTbar
// loop over all systematic error samples
for (unsigned int syst = 0; syst < m_shapesys_arr.size(); ++syst){
TObjArray* arr = m_shapesys_arr[syst];
for (int nplots = 0; nplots < arr->GetEntries(); ++nplots){
SHist* hSys = (SHist*)arr->At(nplots);
TH1* hSyst = hSys->GetHist();
TString systFullName = hSys -> GetProcessName();//e.g. QCD__uncert__plus
systFullName.ReplaceAll("__","#");
TObjArray* systFullNamePieces = systFullName.Tokenize("#");
TString systVariableName = hSys -> GetName();
// continue if the channel of the systematic sample has the same name as the channel of the background process
if (variableName == systVariableName){
// check if the the sign is the same as requested
TString syssign = ((TObjString*) systFullNamePieces->At(2))->GetString();
if (syssign == sign){
// check if systematic uncertainty comes from the same sample as the background (e.g. ttbar)
if (systFullNamePieces->Contains(sampleName)){
absoluteerr = (hSyst->GetBinContent(ibin))-(h->GetBinContent(ibin));
// the second one contains the name of the uncertainty: check if the error should be reduced
TString sysname = ((TObjString*) systFullNamePieces->At(1))->GetString();
// loop over systematics that should be reduced, find the right factor
for (Int_t j=0; j<m_ScaleSysUncName->GetEntries(); ++j){
TString sysname_to_red = ((TObjString*) m_ScaleSysUncName->At(j))->GetString();
if (sysname == sysname_to_red){
absoluteerr *= m_sysweight.At(j);
}
}
// got it: add to the total error in quadrature
squarederr += absoluteerr*absoluteerr;
}
}
}
}
}
}
err = TMath::Sqrt(squarederr);
return err;
}
void SPlotter::PlotRatios(vector<SHist*> hists, int ipad)
{
// plot all histograms in the array
if (ipad==1) m_rp1->cd();
if (ipad==2) m_rp2->cd();
// calculate ratios
vector<SHist*> ratios = CalcRatios(hists);
gPad->SetLogx(0);
gPad->SetLogy(0);
int ndrawn = 0;
int nh = ratios.size();
for (int i=0; i<nh; ++i){
SHist* rh = ratios[i];
rh->DrawNoErrorX(false);
TString name = rh->GetName();
if (name.Contains("_lx")) gPad->SetLogx(1);
if (ndrawn==0) rh->Draw();
else rh->Draw("same");
++ndrawn;
}
gPad->RedrawAxis();
}