Fits for multi pads in one canvas

ROOT
1

I tried to fit the histograms in multi pads in one canvas with a gaus function. However, the last fit overwrites the previous ones when I tried to save this canvas. Please see my simple example in attachment.
test.C (488 Bytes)

2

see solution below:

[code]{
char varname[100],cutname[100];
int i=0;
Double_t p0,p1,p2;
TCanvas c1 = new TCanvas(“c1”,“Gas Cerenkov ADC”,800,600);
TH1F h2 = new TH1F(“h2”,"",100,-100,100);

c1->Divide(2, 2);

while (i<4)
{
  c1->cd(i+1);

  sprintf(cutname,"ADC %d, pedastal",i+1);
  sprintf(cutname,"ADC %d, single ph.e. peak",i+1);
  h2->SetTitle(cutname);
  h2->FillRandom("gaus",6000);
  h2->Fit("gaus","");
  h2->DrawCopy();
  c1->Update();

  i++;
}

}
[/code]

Rene