Setlogy

ROOT
1

Hi! I’d like to know how I can use SetLogy when I have a loop as in the followiong example:

TCanvas *c1 = new TCanvas(“c1”,“canvas”,800,600);
for(int l=0;l<N_PADs;l++){

c1->Divide(2,2);

for (int m=0;m<4;m++){
  c1->cd(m+1); 
  hCha_Rate_PAD_CM_Ijk_Sect7[l][m][0]->Draw();
}

sprintf(title,"S7_PIVOTchan_PAD%i_LY0.gif",l);
c1->Print(title,"gif");
c1->Update();
c1->Clear();

It seems that gPad doesn’t work

2

Using gPad works:

{
        TCanvas *c1 = new TCanvas("c1","canvas",800,600);
         c1->Divide(2,2);
         for (int i = 1; i<=4 ; i++) {
                c1->cd(i);
                hpx->Draw();
                gPad->SetLogy();
         }
}


3

for (int m=0;m<4;m++){ TVirtualPad *pad = c1->cd(m+1); pad->SetLogy(); hCha_Rate_PAD_CM_Ijk_Sect7[l][m][0]->Draw(); }

Rene