void vertical_labels()
{
	TCanvas *c = new TCanvas();
	TGraph *gr = new TGraph(3);
	TH1F * hist = new TH1F("Hgr", "For graph", 3, 0.5, 3.5);
	gr->SetPoint(0, 1, 1);
	gr->SetPoint(1, 2, 0.5);
	gr->SetPoint(2, 3, 1.5);
	gr->SetHistogram(hist);
	gr->SetMaximum(2);
	gr->GetXaxis()->SetBinLabel(1,"Bin_1");
	gr->GetXaxis()->SetBinLabel(2,"Bin_2");
	gr->GetXaxis()->SetBinLabel(3,"Bin_3");
	gr->Draw("AL");
	gr->GetHistogram()->GetXaxis()->LabelsOption("v");
	c->Modified();
	c->Update();
}