Drawing two fitted histograms in separate pads

[amytee]

Hi,

I am having a problem where I fit the same histogram with two different fits, and plot each fitted histogram on a different pad on the same canvas. It seems to be ignoring the divide, and just drawing the second histogram on an undivided canvas.

  TH1* Histogram::qT2FittingTruth( std::string Variable, TFile *File, std::string BDT ){

   TF1 *f1;
   TF1 *f2;
   TH1F *h1;
   TH1F *h2;

 h1 = (TH1F*)File->Get(Form("TruthMC_dnSig_d%s_%s", Variable.c_str(), BDT.c_str()));

TH1F *hFit = (TH1F*)h1->Clone("hFit");
TH1F *hFit2 =(TH1F*)h1->Clone("hFit2");
 
  TCanvas *c = new TCanvas(Form("qTSquaredFit_%s", Variable.c_str() ), Form(    "qTSquaredFit_%s",Variable.c_str() ) , 700, 500);

  c->Divide(2,1);
  
 f1 = new TF1("fit_qT2" ,fitqT2Truth,0.0, 400.0, 3);
 f1->SetParameters(1,5, 0.0);
 f1->SetParLimits(0, 0.0, 3000.0);
 f1->SetParLimits(1, 0.0, 100.0);
 f1->FixParameter(2, 0.0);

  hFit->Fit(f1,"","",0.0 , 400.0);
  hFit->Fit(f1,"","",0.0 , 400.0);

 c->cd(1);
 gPad->SetLogy();
 hFit->Draw();
 hFit->SetMinimum(0.1);

 c->cd(2);
 f2 = new TF1("fit_qT2_addParam" ,fitqT2Truth_addParam,0.0, 400.0, 3);
 f2->SetParameters(1,5, 0.0);
 f2->SetParLimits(0, 0.0, 3000.0);
 f2->SetParLimits(1, 0.0, 100.0);
 f2->FixParameter(2, 0.0);

 hFit2->Fit(f2,"","",0.0 , 400.0);
 hFit2->Fit(f2,"","",0.0 , 400.0);

gPad->SetLogy();
hFit2->Draw();
hFit2->SetMinimum(0.1);

c->SaveAs(Form("Fit_qT2_%s_%s_Truth.eps", Variable.c_str(), BDT.c_str()  ));

return hFit;

}

[Wile_E_Coyote]

Try to move c->cd(1); to before hFit->Fit(...); (at least).