Hi Rooters,

How do I draw y-axis label on both left and right sides?

Thanks.

Hi Rooters,

How do I draw y-axis label on both left and right sides?

Thanks.

```
{
TCanvas *c1 = new TCanvas("c1","transparent pad",200,10,700,500);
TPad *pad1 = new TPad("pad1","",0,0,1,1);
TPad *pad2 = new TPad("pad2","",0,0,1,1);
pad2->SetFillColor(0);
pad2->SetFillStyle(4000);
pad2->SetFrameFillStyle(0);
pad1->Draw();
pad1->cd();
TH1F *h1 = new TH1F("h1","h1",100,-3,3);
TRandom r;
for (Int_t i=0;i<100000;i++) {
Double_t x1 = r.Gaus(-1,0.5);
h1->Fill(x1);
}
h1->Draw();
pad2->Draw();
pad2->cd();
h1->Draw("Y+");
}
```

Thank you very much. May I ask another related question?

I want to plot two x-axes on the same histogram, one at the bottom as usual and another at the top. But these tow axes have different variables and different ranges.

How do I do that?

Thanks.