Edit TPaveStats line

[bethlong06]

I’m trying to add a line to my TPaveStats box to show the resolution of a peak (as defined by Sigma/MPV of a Landau fit). I followed the example from the class reference but it’s not working. Any help would be appreciated.

  TFile *_file0 = TFile::Open("myfile.root");

  gStyle->SetOptStat(0);
  gStyle->SetOptFit(0001);
  
  TCanvas *c1 = new TCanvas("c1","c1",900,700);
  TH1D *h1 = (TH1D*)_file0->Get("h1");
  h1->Draw();
  h1->Fit("landau","W","",25,60);

  c1->Modified();
  c1->Update();
  
  TPaveStats *s1 = (TPaveStats*)h1->FindObject("stats");
  TList *l1      = s1->GetListOfLines();

  TF1 *f1 = h1->GetFunction("landau");
  double MPV = f1->GetParameter("MPV");
  double Sigma = f1->GetParameter("Sigma");
  double Ratio = Sigma/MPV;
  TString Reso = Form("Resolution = %f%%",Ratio*100);
  TLatex *t1 = new TLatex(0,0,Reso);
  t1 ->SetTextFont(42);
  t1 ->SetTextSize(0.04);
  t1 ->SetTextColor(kRed);
  l1->Add(t1);

  c1->Modified();
  c1->Update();

[Wile_E_Coyote]

s1->SetName("mystats"); h1->SetStats(0);

[bethlong06]

Great, now how can I get it to have the same formatting as the default for the other lines? Font, size, etc.

[couet]

https://root.cern/doc/v626/classTPaveStats.html#PS03

[bethlong06]

Yes I read the class reference, put more specifically I guess my question is what are the default font settings for the stats box? If I don’t set the options the new line has completely different presets, so I was wondering if instead of me going trial-and-error to get something relatively similar someone could tell me how to set it to be the same as the other lines

[bethlong06]

Ok I Inspect-ed the stats box and found that the TextFont was 42 and the Size was 0.
The final macro:

  TCanvas *c1 = new TCanvas("c1","c1",900,700);
  TH1D *h1 = (TH1D*)_file0->Get("h1");
  h1->Draw();
  h1->Fit("landau","W","",25,60);

  c1->Modified();
  c1->Update();
  
  TPaveStats *s1 = (TPaveStats*)h1->FindObject("stats");
  s1->SetName("1");
  TList *l1      = s1->GetListOfLines();

  TF1 *f1 = h1->GetFunction("landau");
  double MPV = f1->GetParameter("MPV");
  double Sigma = f1->GetParameter("Sigma");
  double Ratio = Sigma/MPV;
  TString Reso = Form("Resolution = %f%%",Ratio*100);
  TLatex *t1 = new TLatex(0,0,Reso);
  t1 ->SetTextFont(42);
  t1 ->SetTextSize(0);
  l1->Add(t1);
  h1->SetStats(0);

  c1->Modified();
  c1->Update();