void tc()
{
	TH2F *h2 = new TH2F("h2", "h2", 50, -5, 5, 50, -5, 5);
	h2->FillRandom("gaus");
	TCanvas *c2 = new TCanvas("c2", "c2", 0, 0, 400, 400);
	c2->cd();
	Double_t xc[5] = {-4, 0, 0, -4, -4};
	Double_t yc[5] = {-4, -4, 0, 0, -4};
	TCutG *cut = new TCutG("cut1", 5,xc,yc);
	h2->Draw("colz [cut1]");
	TCanvas *hpc = new TCanvas("hpc", "hpc",400, 0, 400, 400);
	hpc->cd();
	TH1D* hp = h2->ProjectionY("py", 0, -1, "[cut1]");
	hp->Draw();
	
	TCanvas *hpcU = new TCanvas("hpcU", "hpcU",800, 0, 400, 400);
	hpcU->cd();
	
	cut->SetName("abc"); 
	TH1D* hpU = h2->ProjectionY("py", 0, -1, "[cut1]");
	hpU->Draw();
}