TGaxis font and tick size

ROOT
1

Dear Rooters,
I’m trying to draw an axis that occupies only half of the canvas, matching the style I set in the rest of my code. My axis1 does not respond fully to the style I set from gStyle: only the TickLength is as expected. Therefore, I try to explicitly set the text font and label size: axis1->SetTextFont(132) and axis1->SetLabelSize(0.05). Although the output of axis1->GetTextFont() and axis1->GetTickLength() have the correct values, when drawn it doesn’t look as expected: only the LabelSize is correct. This happens both in the plot that the CINT produces and in the pdf as I save it.

My goal is to make a plot on the right half of the canvas and write text on the left half of the canvas. I had chosen to do it this way because I can easily match the vertical position of the text with the y-coordinate of my points. Would you find a solution for my problem or suggest me a better way to do this?

My code:

  ---------------globally set for my entire macro------------------
  gStyle->SetTextFont(132);
  gStyle->SetTextSize(0.06);
  gStyle->SetTitleFont(132,"x");
  gStyle->SetTitleFont(132,"y");
  gStyle->SetTitleFont(132,"z");
  gStyle->SetLabelFont(132,"x");
  gStyle->SetLabelFont(132,"y");
  gStyle->SetLabelFont(132,"z");
  gStyle->SetLabelSize(0.05,"x");
  gStyle->SetTitleSize(0.06,"x");
  gStyle->SetLabelSize(0.05,"y");
  gStyle->SetTitleSize(0.06,"y");
  gStyle->SetLabelSize(0.05,"z");
  gStyle->SetTitleSize(0.06,"z");
  
  gStyle->SetTickLength(0.03,"x");//yo
  gStyle->SetTickLength(0.03,"y");
  gStyle->SetTickLength(0.03,"z");
  --------------------------------------------------------------------------

  TCanvas *c4=new TCanvas("c4"," ",1200,700);
  SetCanvasStyle (c4);
  c4->Range(-0.45-0.2,-0.5-0.5,2+0.2,5.5+0.5);
  TGaxis *axis1 = new TGaxis();
  axis1->SetName("axis1");
  cout << "Tick length: " << axis1->GetTickSize() << endl; //This outputs 0.03
  //axis1->SetTickLength(0.03);
  axis1->SetLabelSize(0.05);
  cout << "Text font: " << axis1->GetTextFont() <<endl; //This outputs 62
  axis1->SetTextFont(132);
  axis1->DrawAxis(0.8,-0.5,2,-0.5,0.8,2,510,"+");
  cout << "Text font: " << axis1->GetTextFont() <<endl; //This outputs 132
  c4->Update();

Cheers,
Flavia.

ROOT Version: 6.14/04
_Platform: Ubuntu 18.04.2 LTS (bionic),
Linux 4.15.0-54-generic #58-Ubuntu SMP Mon Jun 24 10:55:24 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
_Compiler: ROOT CINT

2 
axis1->SetTextFont(132);
axis1->SetLabelFont(132);

or:

  axis1->SetTextFont(gStyle->GetTextFont());
  axis1->SetLabelFont(gStyle->GetLabelFont("X"));
1 Like
3

Thank you very much Wile_E_Coyote!!!

axis1->SetLabelFont(132);

This solved the problem with the font!

I still have the problem with the TickLength. Do you have any idea?

4 
axis1->DrawAxis(0.8,-0.5,2,-0.5,0.8,2,510,"S+");
5

Thanks for your reply Wile_E_Coyote!
I tried with your suggestion:

axis1->DrawAxis(0.8,-0.5,2,-0.5,0.8,2,510,"S+");

But didn’t solve the problem of the size of the ticks.

6

Did you change the default? … e.g.:

axis1->SetTickLength(0.3);
7

I’m sorry, you’re right. This:

axis1->SetTickLength(0.3);
axis1->DrawAxis(0.8,-0.5,2,-0.5,0.8,2,510,"S+");

does allow me to change the TickLength and see the effect on the plot. I didn’t realize because the specific number I used (axis1->SetTickLength(0.03)) looks visually different in this plot respect to the others.
Thank you very much Wile_E_Coyote!!! :smile:

8

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