Removing a fit - how?

ROOT
1

Dear Root Talk,

here is a simple one:

how do I remove a fit from a histogram?

Is the only way by resetting the histogram?

Along the same lines, what are the values TObject::Clear(Option_t* = “”) takes?

Thanks

2

Maybe this help ?

{
  TH1F *h1 = new TH1F("h1","",100,-5,5);
  h1->FillRandom("gaus",10000);
  h1->Draw();
  h1->Fit("gaus");
  
  Printf("before");
  h1->GetListOfFunctions()->ls();
  TF1 *fun = h1->GetFunction("gaus");
  h1->GetListOfFunctions()->Remove(fun);
  Printf("after");
  h1->GetListOfFunctions()->ls();
  gPad->Modified();
  
  // or "all in one"
  // h1->GetListOfFunctions()->Remove(h1->GetFunction("gaus"))
}

Jan

3

Thanks, that does :slight_smile:

Any idea of what the options for TObject::Clear() would be?

4

Hi,

depends on what you are calling Clear() on, see e.g. root.cern.ch/root/html/TList#TList:Clear

Axel.

5

Very true, sorry for not being clearer.

I was wondering whether I could use Clear() in order to remove a fit from a histogram?

On a side note, would that be referred to as TH1::Clear()?