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benhoob |
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#include "tmvaglob.C"
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// this macro plots the correlation matrix of the various input
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// variables used in TMVA (e.g. running TMVAnalysis.C). Signal and
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// Background are plotted separately
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// input: - Input file (result from TMVA),
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// - use of colors or grey scale
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// - use of TMVA plotting TStyle
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void correlations( TString fin = "TMVA.root", Bool_t isRegression = kFALSE,
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Bool_t greyScale = kFALSE, Bool_t useTMVAStyle = kTRUE )
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{
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// set style and remove existing canvas'
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TMVAGlob::Initialize( useTMVAStyle );
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// checks if file with name "fin" is already open, and if not opens one
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TFile* file = TMVAGlob::OpenFile( fin );
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// signal and background or regression problem
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Int_t ncls = (isRegression ? 1 : 2 );
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TString hName[2] = { "CorrelationMatrixS", "CorrelationMatrixB" };
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if (isRegression) hName[0]= "CorrelationMatrix";
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const Int_t width = 600;
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for (Int_t ic=0; ic<ncls; ic++) {
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TH2* h2 = file->Get( hName[ic] );
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if(!h2) {
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cout << "Did not find histogram " << hName[ic] << " in " << fin << endl;
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continue;
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}
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TCanvas* c = new TCanvas( hName[ic],
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Form("Correlations between MVA input variables (%s)",
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(isRegression ? "" : (ic==0 ? "signal" : "background"))),
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ic*(width+5)+200, 0, width, width );
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Float_t newMargin1 = 0.13;
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Float_t newMargin2 = 0.15;
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if (TMVAGlob::UsePaperStyle) newMargin2 = 0.13;
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c->SetGrid();
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c->SetTicks();
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c->SetLeftMargin ( newMargin2 );
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c->SetBottomMargin( newMargin2 );
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c->SetRightMargin ( newMargin1 );
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c->SetTopMargin ( newMargin1 );
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gStyle->SetPalette( 1, 0 );
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gStyle->SetPaintTextFormat( "3g" );
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h2->SetMarkerSize( 1.5 );
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h2->SetMarkerColor( 0 );
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Float_t labelSize = 0.040;
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h2->GetXaxis()->SetLabelSize( labelSize );
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h2->GetYaxis()->SetLabelSize( labelSize );
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h2->LabelsOption( "d" );
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h2->SetLabelOffset( 0.011 );// label offset on x axis
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h2->Draw("colz"); // color pads
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c->Update();
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// modify properties of paletteAxis
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TPaletteAxis* paletteAxis = (TPaletteAxis*)h2->GetListOfFunctions()->FindObject( "palette" );
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paletteAxis->SetLabelSize( 0.03 );
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paletteAxis->SetX1NDC( paletteAxis->GetX1NDC() + 0.02 );
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h2->Draw("textsame"); // add text
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// add comment
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TText* t = new TText( 0.53, 0.88, "Linear correlation coefficients in %" );
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t->SetNDC();
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t->SetTextSize( 0.026 );
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t->AppendPad();
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// TMVAGlob::plot_logo( );
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c->Update();
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TString fname = "plots/";
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fname += hName[ic];
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TMVAGlob::imgconv( c, fname );
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}
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}
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