#include <ROOT/RDataFrame.hxx>
#include <iostream>
#include <TCanvas.h>

void test()
{
    auto fileName = "test.root";
    auto treeName = "tree";

    auto c = new TCanvas();
    c->Print("test.pdf[", "pdf");

    ROOT::RDataFrame df(treeName, fileName);

    auto h1 = df.Histo1D({"x", "x", 400, 0, 40}, {"x"});
    auto h2 = df.Define("x2", [](double x)
                        { return 2 * x; },
                        {"x"})
                  .Histo1D({"x2", "x2", 400, 0, 40}, {"x2"});

    std::cout << "foofoofoo" << std::endl;
    h1->Draw();
    h2->SetLineColor(kRed);
    h2->Draw("same");
    std::cout << "barbarbar" << std::endl;
    c->Print("test.pdf", "pdf");
    c->Print("test.pdf]", "pdf");
    // return 0;
}