Re: [ROOT] Base class ambiguity

From: Rene Brun (Rene.Brun@cern.ch)
Date: Wed Feb 27 2002 - 21:11:09 MET


Hi Miha,

In your TModelFunction constructor, add the following statement:
   gROOT->GetListOfFunctions()->Add(this);

see example in:
TF1::TF1(const char *name, Double_t xmin, Double_t xmax, Int_t npar)

Rene Brun


On Wed, 27 Feb 2002 miha.puc@marvin.fmf.uni-lj.si wrote:

> Hi!
> 
> Ok. Thank you. And here is another problem:
> In TModelFunction I override TF1's EvalPar and some other methods. But 
> when I fit or FillRandom a histogram with a TModelFunction the 
> TF1::EvalPar is called which is not what I want. 
> 
> Is there a solution?
> 
> When I call TH1's Add, Divide or Multipy with TModelFunction::EvalPar is 
> called which is OK.
> Also Draw() method works well for TModelFunction objects.
> 
> I use Version   3.03/00   6 February 2002. 
> 
> Miha
> 
> 
> On Tue, 26 Feb 2002, Rene Brun wrote:
> 
> > Hi Miha,
> > 
> > The message from the compiler is clear. Both TF1 and TDataSet
> > derive from TObject. Do not mix apples and oranges.
> > Use TDataSet as a member of your class instead.
> > 
> > Rene Brun
> > 
> > On Tue, 26 Feb 2002 miha.puc@marvin.fmf.uni-lj.si wrote:
> > 
> > > Hi!
> > > I have a class 
> > > class TModelFunction : public TF1, public TDataSet { .....
> > > 
> > > and when compiling I get messages like
> > > 
> > > TModelFunction.cxx:121: type `TObject' is ambiguous base class for type 
> > > `TModelFunction'
> > > TModelFunction.cxx:121: type `TModelFunction' is ambiguous baseclass of 
> > > `TObject'
> > > 
> > > line 121 is:
> > > _Foo = (TModelFunction *) (fList->After(_Foo));
> > > where _Foo is a pointer to TModelFunction object.
> > > 
> > > What shall I do?
> > > 
> > > Regards,
> > > Miha
> > > -- 
> > > 
> > > 
> > 
> > 
> 
> -- 
> 



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