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anderson |
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/*************************************************
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Plot given histograms together (up to 4)
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Parameters to draw 2 histograms:
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plotHists(hist1, hist2, label1, label2, Title, xTitle, yTitle)
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Example use (first step is to prevent a bug in ROOT crashing):
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root [1] .O0
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root [2] .L plotHistsAndRatio.C
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root [3] plotHists(photonEt_Barrel,photonEt_Barrel3TrkCut,"Photon E_{T}","E_{T}","entries/20 GeV Bin","#gamma","#gamma track cut")
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Michael Anderson
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March 18, 2009
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*************************************************/
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weinberg |
1.2 |
#include "TH1.h"
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anderson |
1.1 |
#include <vector>
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#include <cmath>
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weinberg |
1.2 |
TCanvas* plotHists(vector<TH1*> histogramsToPlot, vector<TString> histogramLabels, TString title="", TString xTitle="", TString yTitle="", bool areaNormalize=false) {
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anderson |
1.1 |
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//*************************************************
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// Variables
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bool plotLogY = true; // false = no log; true = log
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weinberg |
1.2 |
vector<int> histColors;
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anderson |
1.1 |
histColors.push_back(kBlack); // change colors as you like
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histColors.push_back(kBlue);
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histColors.push_back(kRed);
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histColors.push_back(kGreen-1);
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float histLineWidth = 2.0;
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bool useMarkers = true; // search online for TAttMarker
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vector<int> histMarkerStyles; // to see all available markers
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weinberg |
1.2 |
histMarkerStyles.push_back( 20 );
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anderson |
1.1 |
histMarkerStyles.push_back( 22 );
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histMarkerStyles.push_back( 21 );
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histMarkerStyles.push_back( 23 );
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float histMarkerSize = 0.9;
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int plotWidth=600;
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int plotHeight=600;
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weinberg |
1.2 |
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anderson |
1.1 |
// END of Variables
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//*************************************************
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// Create the canvas
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TCanvas *c1 = new TCanvas("c1", "c1",0,0,plotWidth,plotHeight);
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// Turn off stats box
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gStyle->SetOptStat(0);
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// Create copies of histograms provided
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// and area normalize, if requested
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weinberg |
1.2 |
vector<TH1*> hists;
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anderson |
1.1 |
for (int i=0; i<histogramsToPlot.size(); i++) {
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weinberg |
1.2 |
hists.push_back( (TH1*)histogramsToPlot[i]->Clone() );
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anderson |
1.1 |
if (areaNormalize) {
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Double_t integral = hists[i]->Integral();
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if (integral>0.0) hists[i]->Scale(1/integral);
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}
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}
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// Set histogram plotting variables
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// and add them to the histogram stack & legend
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THStack *tempStack = new THStack();
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TLegend *infoBox = new TLegend(0.65, 0.70, 0.90, 0.85, "");
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for (int i=0; i<histogramsToPlot.size(); i++) {
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hists[i]->SetLineColor(histColors[i]);
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hists[i]->SetLineWidth(histLineWidth);
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if (useMarkers) {
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hists[i]->SetMarkerStyle(histMarkerStyles[i]);
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hists[i]->SetMarkerColor(histColors[i]);
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hists[i]->SetMarkerSize(histMarkerSize);
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}
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infoBox->AddEntry(hists[i],histogramLabels[i],"LP");
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weinberg |
1.2 |
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anderson |
1.1 |
tempStack->Add(hists[i]);
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}
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// Draw the stack of histograms
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tempStack->Draw("nostack");
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// Set title/label sizes and offsets
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tempStack->GetXaxis()->SetTitleOffset(0.9);
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weinberg |
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tempStack->GetYaxis()->SetTitleOffset(1.2);
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anderson |
1.1 |
tempStack->GetXaxis()->SetLabelSize(0.04);
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tempStack->GetYaxis()->SetLabelSize(0.05);
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tempStack->GetXaxis()->SetTitleSize(0.06);
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weinberg |
1.2 |
tempStack->GetYaxis()->SetTitleSize(0.05);
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anderson |
1.1 |
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// Set axis titles
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tempStack->SetTitle(title+";"+xTitle+";"+yTitle);
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// Draw legend as long as the labels aren't empty
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infoBox->SetShadowColor(0); // 0 = transparent
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infoBox->SetLineColor(0);
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infoBox->SetFillStyle(0);
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if (histogramLabels[0]!="") {
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infoBox->Draw();
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}
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c1->SetLogy(plotLogY);
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return c1;
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}
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weinberg |
1.2 |
TCanvas* plotHists(TH1* hist1, TH1* hist2, TString title="", TString xTitle="", TString yTitle="", TString label1="", TString label2="", bool areaNormalize=false) {
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vector<TH1*> histogramsToPlot;
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anderson |
1.1 |
histogramsToPlot.push_back( hist1 );
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histogramsToPlot.push_back( hist2 );
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vector<TString> histogramLabels;
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histogramLabels.push_back( label1 );
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histogramLabels.push_back( label2 );
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TCanvas* c1 = plotHists(histogramsToPlot, histogramLabels, title, xTitle, yTitle, areaNormalize);
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return c1;
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}
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weinberg |
1.2 |
TCanvas* plotHists(TH1* hist1, TH1* hist2, TH1* hist3, TString title="", TString xTitle="", TString yTitle="", TString label1="", TString label2="", TString label3="", bool areaNormalize=false) {
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vector<TH1*> histogramsToPlot;
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anderson |
1.1 |
histogramsToPlot.push_back( hist1 );
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histogramsToPlot.push_back( hist2 );
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histogramsToPlot.push_back( hist3 );
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vector<TString> histogramLabels;
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histogramLabels.push_back( label1 );
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histogramLabels.push_back( label2 );
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histogramLabels.push_back( label3 );
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TCanvas* c1 = plotHists(histogramsToPlot, histogramLabels, title, xTitle, yTitle, areaNormalize);
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return c1;
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}
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weinberg |
1.2 |
TCanvas* plotHists(TH1* hist1, TH1* hist2, TH1* hist3, TH1* hist4, TString title="", TString xTitle="", TString yTitle="", TString label1="", TString label2="", TString label3="", TString label4="", bool areaNormalize=false) {
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vector<TH1*> histogramsToPlot;
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anderson |
1.1 |
histogramsToPlot.push_back( hist1 );
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histogramsToPlot.push_back( hist2 );
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histogramsToPlot.push_back( hist3 );
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histogramsToPlot.push_back( hist4 );
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vector<TString> histogramLabels;
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histogramLabels.push_back( label1 );
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histogramLabels.push_back( label2 );
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histogramLabels.push_back( label3 );
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histogramLabels.push_back( label4 );
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TCanvas* c1 = plotHists(histogramsToPlot, histogramLabels, title, xTitle, yTitle, areaNormalize);
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return c1;
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}
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