Hi Greg, Your macro works correctly for me. What is your problem? Rene Brun Gregory Novak wrote: > > I want to do a fit to a function and then pluck the function from the > TGraph object. I have the following macro, which shows that "func" > doesn't point to anything. > > I managed to get a hold of the object through GetListOfFunctions, and > found that the function does in fact think it's name is "pol2". So what's > wrong with this code? > > { > Float_t x[] = {1,2,3}; > Float_t y[] = {1,4,9}; > TGraph *tg=new TGraph(3,x,y); > tg->Fit("pol2"); > tg->Draw("AL*"); > TF1 *func; > func=tg->GetFunction("pol2"); > cout << func << endl; > } > > Thanks, > Greg
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