void covMatrix()
{
//=========Macro generated from canvas: c1/c1
//=========  (Wed Jun 15 12:19:48 2016) by ROOT version6.02/05
   TCanvas *c1 = new TCanvas("c1", "c1",236,344,700,500);
   gStyle->SetOptStat(0);
   c1->Range(-1,-1,4,4);
   c1->SetFillColor(0);
   c1->SetBorderMode(0);
   c1->SetBorderSize(2);
   c1->SetFrameBorderMode(0);
   c1->SetFrameBorderMode(0);
   
   TH2F *H = new TH2F("H","",4,-0.5,3.5,4,-0.5,3.5);
   H->SetBinContent(7,1);
   H->SetBinContent(8,-0.07283672);
   H->SetBinContent(9,0.2349442);
   H->SetBinContent(10,0.1460068);
   H->SetBinContent(13,-0.07283672);
   H->SetBinContent(14,1);
   H->SetBinContent(15,-0.3488979);
   H->SetBinContent(16,-0.1317463);
   H->SetBinContent(19,0.2349442);
   H->SetBinContent(20,-0.3488979);
   H->SetBinContent(21,1);
   H->SetBinContent(22,0.3933508);
   H->SetBinContent(25,0.1460068);
   H->SetBinContent(26,-0.1317463);
   H->SetBinContent(27,0.3933508);
   H->SetBinContent(28,1);
   H->SetMinimum(-1);
   H->SetMaximum(1);
   H->SetEntries(16);
   H->SetStats(0);
   H->SetContour(20);
   H->SetContourLevel(0,-1);
   H->SetContourLevel(1,-0.9);
   H->SetContourLevel(2,-0.8);
   H->SetContourLevel(3,-0.7);
   H->SetContourLevel(4,-0.6);
   H->SetContourLevel(5,-0.5);
   H->SetContourLevel(6,-0.4);
   H->SetContourLevel(7,-0.3);
   H->SetContourLevel(8,-0.2);
   H->SetContourLevel(9,-0.1);
   H->SetContourLevel(10,0);
   H->SetContourLevel(11,0.1);
   H->SetContourLevel(12,0.2);
   H->SetContourLevel(13,0.3);
   H->SetContourLevel(14,0.4);
   H->SetContourLevel(15,0.5);
   H->SetContourLevel(16,0.6);
   H->SetContourLevel(17,0.7);
   H->SetContourLevel(18,0.8);
   H->SetContourLevel(19,0.9);
   
   TPaletteAxis *palette = new TPaletteAxis(3.525,-0.5,3.75,3.5,H);
palette->SetLabelColor(1);
palette->SetLabelFont(42);
palette->SetLabelOffset(0.005);
palette->SetLabelSize(0.035);
palette->SetTitleOffset(1);
palette->SetTitleSize(0.06);

   Int_t ci;      // for color index setting
   TColor *color; // for color definition with alpha
   ci = TColor::GetColor("#fffffb");
   palette->SetFillColor(ci);
   palette->SetFillStyle(1001);
   H->GetListOfFunctions()->Add(palette,"br");

   ci = TColor::GetColor("#000099");
   H->SetLineColor(ci);
   H->SetMarkerSize(2);
   H->GetXaxis()->SetBinLabel(1,"E_{T}^{miss}");
   H->GetXaxis()->SetBinLabel(2,"#Delta #phi");
   H->GetXaxis()->SetBinLabel(3,"p_{T}^{ll}");
   H->GetXaxis()->SetBinLabel(4,"#Sigma min m_{lb}");
   H->GetXaxis()->SetLabelFont(42);
   H->GetXaxis()->SetLabelSize(0.05);
   H->GetXaxis()->SetTitleSize(0.06);
   H->GetXaxis()->SetTitleFont(42);
   H->GetYaxis()->SetBinLabel(1,"E_{T}^{miss}");
   H->GetYaxis()->SetBinLabel(2,"#Delta #phi");
   H->GetYaxis()->SetBinLabel(3,"p_{T}^{ll}");
   H->GetYaxis()->SetBinLabel(4,"#Sigma min m_{lb}");
   H->GetYaxis()->SetLabelFont(42);
   H->GetYaxis()->SetLabelSize(0.05);
   H->GetYaxis()->SetTitleSize(0.06);
   H->GetYaxis()->SetTitleFont(42);
   H->GetZaxis()->SetTitle("#rho");
   H->GetZaxis()->SetLabelFont(42);
   H->GetZaxis()->SetLabelSize(0.035);
   H->GetZaxis()->SetTitleSize(0.06);
   H->GetZaxis()->SetTitleFont(42);
   H->Draw("colz text0");
   c1->Modified();
   c1->cd();
   c1->SetSelected(c1);
}