MultivariateAnalysis/macros/variables.C

#include "tmvaglob.C"

// this macro plots the distributions of the different input variables
// used in TMVA (e.g. running TMVAnalysis.C).  Signal and Background are overlayed.

// input: - Input file (result from TMVA),
//        - normal/decorrelated/PCA
//        - use of TMVA plotting TStyle
void variables( TString fin = "TMVA.root", TMVAGlob::TypeOfPlot type = TMVAGlob::kNormal, bool useTMVAStyle=kTRUE )
{

   const TString directories[3] = { "InputVariables_NoTransform",
                                    "InputVariables_DecorrTransform",
                                    "InputVariables_PCATransform" };

   const TString titles[3] = { "TMVA Input Variable",
                               "Decorrelated TMVA Input Variables",
                               "Principal Component Transformed TMVA Input Variables" };

   const TString outfname[3] = { "variables",
                                 "variables_decorr",
                                 "variables_pca" };


   // set style and remove existing canvas'
   TMVAGlob::Initialize( useTMVAStyle );

   // checks if file with name "fin" is already open, and if not opens one
   TFile* file = TMVAGlob::OpenFile( fin );

   TDirectory* dir = (TDirectory*)file->Get( directories[type] );
   if (dir==0) {
      cout << "No information about " << titles[type] << " available in " << fin << endl;
      return;
   }
   dir->cd();

   // how many plots are in the directory?
   Int_t noPlots = ((dir->GetListOfKeys())->GetEntries()) / 2;

   // define Canvas layout here!
   // default setting
   Int_t xPad;  // no of plots in x
   Int_t yPad;  // no of plots in y
   Int_t width; // size of canvas
   Int_t height;
   switch (noPlots) {
   case 1:
      xPad = 1; yPad = 1; width = 550; height = 0.50*width; break;
   case 2:
      xPad = 2; yPad = 1; width = 600; height = 0.50*width; break;
   case 3:
      xPad = 3; yPad = 1; width = 900; height = 0.4*width; break;
   case 4:
      xPad = 2; yPad = 2; width = 600; height = width; break;
   default:
      //xPad = 3; yPad = 2; width = 800; height = 0.55*width; break;
      xPad = 1; yPad = 1; width = 800; height = 0.75*width; break;
   }
   Int_t noPadPerCanv = xPad * yPad ;

   // counter variables
   Int_t countCanvas = 0;
   Int_t countPad    = 0;

   // loop over all objects in directory
   TIter next(dir->GetListOfKeys());
   TKey    * key  = 0;
   TCanvas * canv = 0;
   while ((key = (TKey*)next())) {
      if (key->GetCycle() != 1) continue;

      if(! TString(key->GetName()).Contains("__S")) continue;

      // make sure, that we only look at histograms
      TClass *cl = gROOT->GetClass(key->GetClassName());
      if (!cl->InheritsFrom("TH1")) continue;
      TH1 *sig = (TH1*)key->ReadObj();
      TString hname(sig->GetName());

      // create new canvas
      if (countPad%noPadPerCanv==0) {
         ++countCanvas;
         canv = new TCanvas( Form("canvas%d", countCanvas), titles[type],
                             countCanvas*50+50, countCanvas*20, width, height );
         canv->Divide(xPad,yPad);
         canv->Draw();
      }

      TPad* cPad = (TPad*)canv->cd(countPad++%noPadPerCanv+1);
      
      // find the corredponding backgrouns histo
      TString bgname = hname;
      bgname.ReplaceAll("__S","__B");
      TH1 *bgd = (TH1*)dir->Get(bgname);
      if (bgd == NULL) {
         cout << "ERROR!!! couldn't find backgroung histo for" << hname << endl;
         exit;
      }

      // this is set but not stored during plot creation in MVA_Factory
      TMVAGlob::SetSignalAndBackgroundStyle( sig, bgd );

      // chop off "signal"
      TString title(sig->GetTitle());
      title.ReplaceAll("signal","");
      sig->SetTitle( TString( titles[type] ) + ": " + title );
      TMVAGlob::SetFrameStyle( sig, 1.2 );

      // normalise both signal and background
      TMVAGlob::NormalizeHists( sig, bgd );

      // finally plot and overlay
      Float_t sc = 1.1;
      if (countPad==2) sc = 1.3;
      sig->SetMaximum( TMath::Max( sig->GetMaximum(), bgd->GetMaximum() )*sc );
         // DEBUG signal color
         sig->SetLineColor(4);
      sig->Draw( "hist" );
      cPad->SetLeftMargin( 0.17 );

      bgd->Draw("histsame");
      sig->GetXaxis()->SetTitle( title );
      sig->GetYaxis()->SetTitleOffset( 1.80 );
      sig->GetYaxis()->SetTitle("Normalised");

      // Draw legend
      if (countPad==2){
         TLegend *legend= new TLegend( cPad->GetLeftMargin(), 
                                       1-cPad->GetTopMargin()-.15, 
                                       cPad->GetLeftMargin()+.4, 
                                       1-cPad->GetTopMargin() );
         legend->SetFillStyle(1);
         legend->AddEntry(sig,"Signal","F");
         legend->AddEntry(bgd,"Background","F");
         legend->Draw("same");
         legend->SetBorderSize(1);
         legend->SetMargin( 0.3 );
      } 

      // redraw axes
      sig->Draw("sameaxis");

      // text for overflows
      Int_t nbin = sig->GetNbinsX();
      TString uoflow = Form( "U/O-flow (S,B): (%.1f, %.1f)% / (%.1f, %.1f)%", 
                             sig->GetBinContent(0)*100, bgd->GetBinContent(0)*100,
                             sig->GetBinContent(nbin+1)*100, bgd->GetBinContent(nbin+1)*100 );
      TText* t = new TText( 0.98, 0.14, uoflow );
      t->SetNDC();
      t->SetTextSize( 0.040 );
      t->SetTextAngle( 90 );
      t->AppendPad();    

      // save canvas to file
      if (countPad%noPadPerCanv==0) {
         TString fname = Form( "plots/%s_c%i", outfname[type].Data(), countCanvas );
         TMVAGlob::plot_logo();
         TMVAGlob::imgconv( canv, fname );
         //fname.Append(".eps");
         //cPad->SaveAs(fname );
      }
      
   }
   

   return;
}
Revision:	1.2
Committed:	Thu May 7 00:33:26 2009 UTC (15 years, 11 months ago) by kukartse
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+6 -2 lines
Log Message:	tmvaglob and variables changed for paper style
#	User	Rev	Content
1	kukartse	1.1	#include "tmvaglob.C"
2
3			// this macro plots the distributions of the different input variables
4			// used in TMVA (e.g. running TMVAnalysis.C). Signal and Background are overlayed.
5
6			// input: - Input file (result from TMVA),
7			// - normal/decorrelated/PCA
8			// - use of TMVA plotting TStyle
9			void variables( TString fin = "TMVA.root", TMVAGlob::TypeOfPlot type = TMVAGlob::kNormal, bool useTMVAStyle=kTRUE )
10			{
11
12			const TString directories[3] = { "InputVariables_NoTransform",
13			"InputVariables_DecorrTransform",
14			"InputVariables_PCATransform" };
15
16			const TString titles[3] = { "TMVA Input Variable",
17			"Decorrelated TMVA Input Variables",
18			"Principal Component Transformed TMVA Input Variables" };
19
20			const TString outfname[3] = { "variables",
21			"variables_decorr",
22			"variables_pca" };
23
24
25			// set style and remove existing canvas'
26			TMVAGlob::Initialize( useTMVAStyle );
27
28			// checks if file with name "fin" is already open, and if not opens one
29			TFile* file = TMVAGlob::OpenFile( fin );
30
31			TDirectory* dir = (TDirectory*)file->Get( directories[type] );
32			if (dir==0) {
33			cout << "No information about " << titles[type] << " available in " << fin << endl;
34			return;
35			}
36			dir->cd();
37
38			// how many plots are in the directory?
39			Int_t noPlots = ((dir->GetListOfKeys())->GetEntries()) / 2;
40
41			// define Canvas layout here!
42			// default setting
43			Int_t xPad; // no of plots in x
44			Int_t yPad; // no of plots in y
45			Int_t width; // size of canvas
46			Int_t height;
47			switch (noPlots) {
48			case 1:
49			xPad = 1; yPad = 1; width = 550; height = 0.50*width; break;
50			case 2:
51			xPad = 2; yPad = 1; width = 600; height = 0.50*width; break;
52			case 3:
53			xPad = 3; yPad = 1; width = 900; height = 0.4*width; break;
54			case 4:
55			xPad = 2; yPad = 2; width = 600; height = width; break;
56			default:
57	kukartse	1.2	//xPad = 3; yPad = 2; width = 800; height = 0.55*width; break;
58			xPad = 1; yPad = 1; width = 800; height = 0.75*width; break;
59	kukartse	1.1	}
60			Int_t noPadPerCanv = xPad * yPad ;
61
62			// counter variables
63			Int_t countCanvas = 0;
64			Int_t countPad = 0;
65
66			// loop over all objects in directory
67			TIter next(dir->GetListOfKeys());
68			TKey * key = 0;
69			TCanvas * canv = 0;
70			while ((key = (TKey*)next())) {
71			if (key->GetCycle() != 1) continue;
72
73			if(! TString(key->GetName()).Contains("__S")) continue;
74
75			// make sure, that we only look at histograms
76			TClass *cl = gROOT->GetClass(key->GetClassName());
77			if (!cl->InheritsFrom("TH1")) continue;
78			TH1 sig = (TH1)key->ReadObj();
79			TString hname(sig->GetName());
80
81			// create new canvas
82			if (countPad%noPadPerCanv==0) {
83			++countCanvas;
84			canv = new TCanvas( Form("canvas%d", countCanvas), titles[type],
85			countCanvas50+50, countCanvas20, width, height );
86			canv->Divide(xPad,yPad);
87			canv->Draw();
88			}
89
90			TPad* cPad = (TPad*)canv->cd(countPad++%noPadPerCanv+1);
91
92			// find the corredponding backgrouns histo
93			TString bgname = hname;
94			bgname.ReplaceAll("__S","__B");
95			TH1 bgd = (TH1)dir->Get(bgname);
96			if (bgd == NULL) {
97			cout << "ERROR!!! couldn't find backgroung histo for" << hname << endl;
98			exit;
99			}
100
101			// this is set but not stored during plot creation in MVA_Factory
102			TMVAGlob::SetSignalAndBackgroundStyle( sig, bgd );
103
104			// chop off "signal"
105			TString title(sig->GetTitle());
106			title.ReplaceAll("signal","");
107			sig->SetTitle( TString( titles[type] ) + ": " + title );
108			TMVAGlob::SetFrameStyle( sig, 1.2 );
109
110			// normalise both signal and background
111			TMVAGlob::NormalizeHists( sig, bgd );
112
113			// finally plot and overlay
114			Float_t sc = 1.1;
115			if (countPad==2) sc = 1.3;
116			sig->SetMaximum( TMath::Max( sig->GetMaximum(), bgd->GetMaximum() )*sc );
117			// DEBUG signal color
118			sig->SetLineColor(4);
119			sig->Draw( "hist" );
120			cPad->SetLeftMargin( 0.17 );
121
122			bgd->Draw("histsame");
123			sig->GetXaxis()->SetTitle( title );
124			sig->GetYaxis()->SetTitleOffset( 1.80 );
125			sig->GetYaxis()->SetTitle("Normalised");
126
127			// Draw legend
128			if (countPad==2){
129			TLegend *legend= new TLegend( cPad->GetLeftMargin(),
130			1-cPad->GetTopMargin()-.15,
131			cPad->GetLeftMargin()+.4,
132			1-cPad->GetTopMargin() );
133			legend->SetFillStyle(1);
134			legend->AddEntry(sig,"Signal","F");
135			legend->AddEntry(bgd,"Background","F");
136			legend->Draw("same");
137			legend->SetBorderSize(1);
138			legend->SetMargin( 0.3 );
139			}
140
141			// redraw axes
142			sig->Draw("sameaxis");
143
144			// text for overflows
145			Int_t nbin = sig->GetNbinsX();
146			TString uoflow = Form( "U/O-flow (S,B): (%.1f, %.1f)% / (%.1f, %.1f)%",
147			sig->GetBinContent(0)100, bgd->GetBinContent(0)100,
148			sig->GetBinContent(nbin+1)100, bgd->GetBinContent(nbin+1)100 );
149			TText* t = new TText( 0.98, 0.14, uoflow );
150			t->SetNDC();
151			t->SetTextSize( 0.040 );
152			t->SetTextAngle( 90 );
153			t->AppendPad();
154
155			// save canvas to file
156			if (countPad%noPadPerCanv==0) {
157			TString fname = Form( "plots/%s_c%i", outfname[type].Data(), countCanvas );
158			TMVAGlob::plot_logo();
159			TMVAGlob::imgconv( canv, fname );
160	kukartse	1.2	//fname.Append(".eps");
161			//cPad->SaveAs(fname );
162	kukartse	1.1	}
163	kukartse	1.2
164	kukartse	1.1	}
165	kukartse	1.2
166	kukartse	1.1
167			return;
168			}