{
gROOT->Reset();
TCanvas *c = new TCanvas("c","Test",0,0,400,200);
c->Divide(2,1);

Double_t x[3] = {1,2,3};
Double_t y[3] = {1,4,9};
TGraph *g = new TGraph(3,x,y);
g->SetLineWidth(4);

c->cd(1);
g->SetLineColor(kRed);
g->Draw("apc");
TLegend *l = new TLegend(0.15,0.75,0.4,0.85);
l->AddEntry(g,"g","l");
l->Draw();

c->cd(2);
TGraph *g2 = (TGraph*)g->DrawClone("apc");
g2->SetLineColor(kBlue);
TLegend *l = new TLegend(0.15,0.75,0.4,0.85);
l->AddEntry(g2,"g2","l");
l->Draw();
}