| 1 |
/*************************************************
|
| 2 |
Automatically plots histograms from two files
|
| 3 |
onto the same plot and saves them.
|
| 4 |
It looksfor ALL histograms in the first file
|
| 5 |
and plots the corresponding histogram in the 2nd
|
| 6 |
file onto the sample plot.
|
| 7 |
|
| 8 |
Can be run from a bash prompt as well:
|
| 9 |
root -b -l -q "plotHistogramsTogether.C(\"fileA.root\",\"fileB.root\")"
|
| 10 |
root -b -l -q "plotHistogramsTogether.C(\"fileA.root\",\"fileB.root\",\"Signal\",\"Background\",10,2,1)"
|
| 11 |
|
| 12 |
Michael B. Anderson
|
| 13 |
Sept 5, 2008
|
| 14 |
*************************************************/
|
| 15 |
|
| 16 |
#include <string.h>
|
| 17 |
#include "TFile.h"
|
| 18 |
#include "TH1.h"
|
| 19 |
#include "TKey.h"
|
| 20 |
#include "Riostream.h"
|
| 21 |
|
| 22 |
// Accesable everywhere
|
| 23 |
TObject *obj;
|
| 24 |
TFile *sourceFile1, *sourceFile2;
|
| 25 |
TString label1, label2;
|
| 26 |
TString outputFolder,outputFilename;
|
| 27 |
TCanvas *canvasDefault;
|
| 28 |
Float_t scale1, scale2;
|
| 29 |
bool showStatsBoxes;
|
| 30 |
|
| 31 |
// *******************************************
|
| 32 |
// Variables
|
| 33 |
TString imageType = "gif";
|
| 34 |
int outputWidth = 480;
|
| 35 |
int outputHeight = 360;
|
| 36 |
bool yAxisLogScale = false;
|
| 37 |
// End of Variables
|
| 38 |
// *******************************************
|
| 39 |
|
| 40 |
|
| 41 |
void plotHistogramsTogether(TString fileName1,
|
| 42 |
TString fileName2,
|
| 43 |
TString fileLabel1 = "",
|
| 44 |
TString fileLabel2 = "",
|
| 45 |
Float_t fileScale1 = 1.0,
|
| 46 |
Float_t fileScale2 = 1.0,
|
| 47 |
bool showStats = false) {
|
| 48 |
|
| 49 |
// If file labels were not given as argument,
|
| 50 |
// use the filename as a label
|
| 51 |
if (fileLabel1 == "") {
|
| 52 |
fileLabel1 = fileName1;
|
| 53 |
fileLabel2 = fileName2;
|
| 54 |
fileLabel1.ReplaceAll(".root","");
|
| 55 |
fileLabel1.ReplaceAll(".root","");
|
| 56 |
}
|
| 57 |
label1 = fileLabel1;
|
| 58 |
label2 = fileLabel2;
|
| 59 |
|
| 60 |
// Set the scale of the histograms.
|
| 61 |
// If they are < 0.0, they will be area normalized
|
| 62 |
scale1 = fileScale1;
|
| 63 |
scale2 = fileScale2;
|
| 64 |
showStatsBoxes = showStats;
|
| 65 |
|
| 66 |
sourceFile1 = TFile::Open( fileName1 );
|
| 67 |
sourceFile2 = TFile::Open( fileName2 );
|
| 68 |
|
| 69 |
outputFolder = "HistogramsTogether/"; // Blank to use current directory,
|
| 70 |
// or, for a specific dir type
|
| 71 |
// something like "images/"
|
| 72 |
|
| 73 |
gSystem->MakeDirectory(outputFolder);
|
| 74 |
|
| 75 |
canvasDefault = new TCanvas("canvasDefault","testCanvas",outputWidth,outputHeight);
|
| 76 |
|
| 77 |
// This function will plot all histograms from
|
| 78 |
// file1 against matching histogram from file2
|
| 79 |
recurseOverKeys(sourceFile1);
|
| 80 |
|
| 81 |
sourceFile1->Close();
|
| 82 |
sourceFile2->Close();
|
| 83 |
|
| 84 |
TString currentDir = gSystem->pwd();
|
| 85 |
cout << "Done. See images in:" << endl << currentDir << "/" << outputFolder << endl;
|
| 86 |
}
|
| 87 |
|
| 88 |
void recurseOverKeys( TDirectory *target1 ) {
|
| 89 |
|
| 90 |
// Figure out where we are
|
| 91 |
TString path( (char*)strstr( target1->GetPath(), ":" ) );
|
| 92 |
path.Remove( 0, 2 );
|
| 93 |
|
| 94 |
sourceFile1->cd( path );
|
| 95 |
|
| 96 |
TDirectory *current_sourcedir = gDirectory;
|
| 97 |
|
| 98 |
TKey *key;
|
| 99 |
TIter nextkey(current_sourcedir->GetListOfKeys());
|
| 100 |
|
| 101 |
while (key = (TKey*)nextkey()) {
|
| 102 |
|
| 103 |
obj = key->ReadObj();
|
| 104 |
|
| 105 |
// Check if this is a 1D histogram or a directory
|
| 106 |
if (obj->IsA()->InheritsFrom("TH1F")) {
|
| 107 |
|
| 108 |
// **************************
|
| 109 |
// Plot & Save this Histogram
|
| 110 |
TH1F *htemp1, *htemp2;
|
| 111 |
|
| 112 |
htemp1 = (TH1F*)obj;
|
| 113 |
TString histName = htemp1->GetName();
|
| 114 |
|
| 115 |
if (path != "") {
|
| 116 |
sourceFile2->GetObject(path+"/"+histName, htemp2);
|
| 117 |
} else {
|
| 118 |
sourceFile2->GetObject(histName, htemp2);
|
| 119 |
}
|
| 120 |
|
| 121 |
outputFilename=histName;
|
| 122 |
plot2Histograms(htemp1, htemp2, outputFolder+path+"/"+outputFilename+"."+imageType);
|
| 123 |
|
| 124 |
} else if ( obj->IsA()->InheritsFrom( "TDirectory" ) ) {
|
| 125 |
// it's a subdirectory
|
| 126 |
|
| 127 |
cout << "Found subdirectory " << obj->GetName() << endl;
|
| 128 |
gSystem->MakeDirectory(outputFolder+path+"/"+obj->GetName());
|
| 129 |
|
| 130 |
// obj is now the starting point of another round of merging
|
| 131 |
// obj still knows its depth within the target file via
|
| 132 |
// GetPath(), so we can still figure out where we are in the recursion
|
| 133 |
recurseOverKeys( (TDirectory*)obj );
|
| 134 |
|
| 135 |
} // end of IF a TDriectory
|
| 136 |
}
|
| 137 |
}
|
| 138 |
|
| 139 |
void plot2Histograms(TH1* htemp1, TH1* htemp2, TString filename) {
|
| 140 |
|
| 141 |
//TString title = htemp1->GetName();
|
| 142 |
TString title = htemp1->GetTitle();
|
| 143 |
|
| 144 |
// Scale by given factor.
|
| 145 |
// If given factor is negative, area normalize
|
| 146 |
if (scale1 > 0.0) {
|
| 147 |
htemp1->Scale(scale1);
|
| 148 |
} else {
|
| 149 |
Double_t integral = htemp1->Integral();
|
| 150 |
if (integral>0.0) htemp1->Scale(1/integral);
|
| 151 |
}
|
| 152 |
if (scale2 > 0.0) {
|
| 153 |
htemp2->Scale(scale2);
|
| 154 |
} else {
|
| 155 |
Double_t integral = htemp2->Integral();
|
| 156 |
if (integral>0.0) htemp2->Scale(1/integral);
|
| 157 |
}
|
| 158 |
|
| 159 |
// Set the histogram colors & lines
|
| 160 |
htemp1->SetLineColor(kRed);
|
| 161 |
htemp2->SetLineColor(kBlue);
|
| 162 |
htemp1->SetLineWidth(1);
|
| 163 |
htemp2->SetLineWidth(2);
|
| 164 |
|
| 165 |
// Turn off stats
|
| 166 |
if (!showStatsBoxes) {
|
| 167 |
gStyle->SetOptStat(0);
|
| 168 |
}
|
| 169 |
|
| 170 |
// Create TStack but we will draw without stacking
|
| 171 |
THStack *tempStack = new THStack();
|
| 172 |
tempStack->Add(htemp1,"same");
|
| 173 |
tempStack->Add(htemp2,"same");
|
| 174 |
|
| 175 |
// Draw the histogram and titles
|
| 176 |
tempStack->Draw("hist nostack");
|
| 177 |
tempStack->SetTitle(title);
|
| 178 |
//tempStack->GetXaxis()->SetTitle(titleX);
|
| 179 |
|
| 180 |
// Draw the legend
|
| 181 |
TLegend *infoBox = new TLegend(0.75, 0.83, 0.99, 0.99, "");
|
| 182 |
infoBox->AddEntry(htemp1,label1,"L");
|
| 183 |
infoBox->AddEntry(htemp2,label2,"L");
|
| 184 |
infoBox->Draw();
|
| 185 |
|
| 186 |
// Place the stats boxes to be non-overlapping
|
| 187 |
if (showStatsBoxes) {
|
| 188 |
canvasDefault->SetRightMargin(0.2);
|
| 189 |
canvasDefault->Update();
|
| 190 |
TPaveStats *st1 = (TPaveStats*)htemp1->GetListOfFunctions()->FindObject("stats");
|
| 191 |
TPaveStats *st2 = (TPaveStats*)htemp2->GetListOfFunctions()->FindObject("stats");
|
| 192 |
st1->SetX1NDC(.79); st1->SetX2NDC(.99);
|
| 193 |
st1->SetY1NDC(.6); st1->SetY2NDC(.8);
|
| 194 |
st2->SetX1NDC(.79); st2->SetX2NDC(.99);
|
| 195 |
st2->SetY1NDC(.38); st2->SetY2NDC(.58);
|
| 196 |
canvasDefault->Modified();
|
| 197 |
}
|
| 198 |
|
| 199 |
// Set log y axis
|
| 200 |
if (yAxisLogScale) canvasDefault->SetLogy(1);
|
| 201 |
// Save the canvas
|
| 202 |
canvasDefault->SaveAs(filename);
|
| 203 |
|
| 204 |
}
|
| 205 |
|
