void Draw_test()
{
    TH1F *hist = new TH1F("hist","Test TH1F", 40, -2., 2.);

    hist->FillRandom("gaus",1e7);
    hist->GetXaxis()->SetTitle("X axis, a.u.");
    hist->GetYaxis()->SetTitle("Y axis, a.u.");

    hist->SetMarkerStyle(20);
    hist->SetMarkerColor(kBlue+1);
    hist->SetLineColor(kBlue+1);
    hist->SetMarkerSize(1.2);

    //Simple TCanvas
    TCanvas *canv1 = new TCanvas("canv1", "Test canvas 1", 700, 500);
    canv1->cd();
    hist->Draw("P");
    canv1->SaveAs("./test_hist_canv1.pdf");

    //Simple divided TCanvas
    TCanvas *canv2 = new TCanvas("canv2", "Test canvas 2", 1400, 500);
    canv2->Divide(2,1);
    canv2->cd(1);
    hist->Draw("P");
    canv2->cd(2);
    hist->Draw("P");
    canv2->SaveAs("./test_hist_canv2.pdf");

    //TCanvas with TPads
    double dx = 0.07;
    double dy = 0.1;
    TCanvas *canv3 = new TCanvas("canv3", "Test canvas 3", 1400, 750);
    TPad *pad[4];
    pad[0] = new TPad(Form("pad_%i", 0), Form("pad for file %i", 0), 0., (1. + 2. * dy) / 3., (1. + dx) / 2., 1.);
    pad[1] = new TPad(Form("pad_%i", 1), Form("pad for file %i", 1), (1. + dx) / 2., (1. + 2. * dy) / 3., 1., 1.);
    pad[2] = new TPad(Form("pad_%i", 2), Form("pad for ratio of file %i", 2), 0., dy/2., (1. + dx) / 2., (1. + 2. * dy) / 3.);
    pad[3] = new TPad(Form("pad_ratio_%i", 3), Form("pad for ratio of file %i", 3), (1. + dx) / 2., dy/2., 1., (1. + 2. * dy) / 3.);

    pad[0]->SetMargin(2. * dx, 0.001, 0.001, 0.01);
    pad[1]->SetMargin(0.001, 0.001, 0.001, 0.01);
    pad[2]->SetMargin(2. * dx, 0.001, dy, 0.001);
    pad[3]->SetMargin(0.001, 0.001, dy, 0.001);

    canv3->cd();
    for (int i = 0; i < 4; i++)
    {
        pad[i]->Draw();
    }

    pad[0]->cd();
    hist->Draw("P");
    pad[1]->cd();
    hist->Draw("P");
    pad[2]->cd();
    hist->Draw("P");
    pad[3]->cd();
    hist->Draw("P");

    canv3->SaveAs("./test_hist_canv3.pdf");
}