Draw a TH1 on the center of a TH2Poly bin

[Yeung]

Hi,

I would like to know how to draw a TH1 on the center of a TH2Poly bin.

The TH2Poly is created as follows:

  auto c = new TCanvas("c","",800,1000);
  TH2Poly *hc = new TH2Poly();
  hc->SetTitle(";x [mm];y [mm]");
  hc->Honeycomb(0,0,TMath::Sqrt2(),4,3,"h");
  hc->SetStats(0);
  hc->Draw("L");
  gPad->Modified(); gPad->Update();
  gPad->GetFrame()->SetLineColor(0);
  c->SetRealAspectRatio(1);

Thanks a lot!

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ROOT Version: 6.31/01
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[dastudillo]

Check out the transpad.C tutorial. Also found online. Just adjust the position and size of the transparent pad for your case.

[Yeung]

Thanks.
What if I need to draw on each bin center of the TH2Poly? Is there an easier way to get the positions?

[couet]

@Yeung

What if I need to draw on each bin center of the TH2Poly? Is there an easier way to get the positions?

You will need to do the computation yourself.
You can try to divide the canvas with Divide().
But surely some adjustments will be needed.