# TMultiGraph example

    {
       gROOT->Reset();
       gStyle->SetOptFit();
       c1 = new TCanvas("c1","multigraph",200,10,700,500);
       c1->SetGrid();

          // draw a frame to define the range
       TMultiGraph *mg = new TMultiGraph();

          // create first graph
       Int_t n1 = 10;
       Double_t x1[]  = {-0.1, 0.05, 0.25, 0.35, 0.5, 0.61,0.7,0.85,0.89,0.95};
       Double_t y1[]  = {-1,2.9,5.6,7.4,9,9.6,8.7,6.3,4.5,1};
       Double_t ex1[] = {.05,.1,.07,.07,.04,.05,.06,.07,.08,.05};
       Double_t ey1[] = {.8,.7,.6,.5,.4,.4,.5,.6,.7,.8};
       gr1 = new TGraphErrors(n1,x1,y1,ex1,ey1);
       gr1->SetMarkerColor(kBlue);
       gr1->SetMarkerStyle(21);
       gr1->Fit("pol6","q");
       mg->Add(gr1);

          // create second graph
       Int_t n2 = 10;
       Float_t x2[]  = {-0.28, 0.005, 0.19, 0.29, 0.45, 0.56,0.65,0.80,0.90,1.01};
       Float_t y2[]  = {2.1,3.86,7,9,10,10.55,9.64,7.26,5.42,2};
       Float_t ex2[] = {.04,.12,.08,.06,.05,.04,.07,.06,.08,.04};
       Float_t ey2[] = {.6,.8,.7,.4,.3,.3,.4,.5,.6,.7};
       gr2 = new TGraphErrors(n2,x2,y2,ex2,ey2);
       gr2->SetMarkerColor(kRed);
       gr2->SetMarkerStyle(20);
       gr2->Fit("pol5","q");

       mg->Add(gr2);

       mg->Draw("ap");

         //force drawing of canvas to generate the fit TPaveStats
       c1->Update();
       TPaveStats *stats1 = (TPaveStats*)gr1->GetListOfFunctions()->FindObject("stats");
       TPaveStats *stats2 = (TPaveStats*)gr2->GetListOfFunctions()->FindObject("stats");
       stats1->SetTextColor(kBlue);
       stats2->SetTextColor(kRed);
       stats1->SetX1NDC(0.12); stats1->SetX2NDC(0.32); stats1->SetY1NDC(0.75);
       stats2->SetX1NDC(0.72); stats2->SetX2NDC(0.92); stats2->SetY1NDC(0.78);
       c1->Modified();
    }