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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