Hi, My question was not very clear... sorry I've in a ROOT file a TF1 object that has been created using an user defined TFormula. I mean that the formula of the TF1 object (TNamed::fTitle) contains the TNamed::fName of an user define TFormula object. This TF1 object has been compiled and has been written in a ROOT file. Now I have to open the ROOT file, load the TF1 object and retrieve its formula. The formula is stored in the TFormula object tables of the TF1 object and the TNamed::fTitle member variable contains the TFormula object name (this TFormula object doesn't exist anymore because only the TF1 object is contained in the ROOT file). I want to get the mathematical expression of the function contained in the TF1 object, expression that doesn't depend on a TFormula object name. It's not a problem if this expression is different from the original expression (when the TF1 object has been created the first time), I just want it to be equivalent. I want to apply a scaling factor and some complexe cuts on the TF1 object, so it's essential to retrieve the expression. Thank you! Pierre-Luc Drouin On Thu, 12 Jun 2003, Rene Brun wrote: > Hi Pierre-Luc, > > TFormula is a TNamed. If you have TFormula* f, do > f->GetTitle(); > > Rene Brun > > On Thu, 12 Jun 2003, > Pierre-Luc Drouin wrote: > > > Hi, > > > > How can I retrieve the formula string from a TFormula instance if > > SetTitle() has been called to change the default title by something else? > > > > Must ROOT users not call SetTitle() with a non mathematical string? > > > > Is it possible to retrieve a formula string from TFormula object tables? > > > > Thank you! > > > > Pierre-Luc Drouin > > >
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