Move to the pro release 3.05/07 Rene Brun On Mon, 11 Aug 2003 jgonzalez@hepmail.physics.neu.edu wrote: > Hi all > > I got the following problem with the script I attached in the end: > > It works fine but when I place the cursor on top of the pad then a message > appears "Error: operator '/' divided by zero FILE:like.C LINE:10" > > The weird thing is that 0 shouldn't be in the range for any parameter so > how come root is evaluating the function there? > > In case you are interested: > root version 3.05/03 > > Thanks > > Javier > > P.s.: here goes the file (copy pasted) > > Float_t loglike(Double_t* x, Double_t* par) > { > Float_t loglikelihood = 0; > Float_t level[5] = {0.7,0.8,0.9,1.0,1.2}; > Float_t time[5] = {38.36,41.63,45.33,49.97,55.39}; > > if(x[1] == 0) cout << "x[1] is zero!!" << endl; > for(int i = 0; i != 5; i++) > { > Float_t calcul = (0.3066/x[1] + 0.1749*(1-x[0])*(level[i]+0.2838) + > 0.003522); > loglikelihood += pow( (time[i] - calcul),2.0)/2; > } > return loglikelihood; > } > > void like() > { > // x_range is (0.8,0.98) y_range is (1000.0,10000.0) > > TF2* chi2 = new TF2("chi2",loglike,0.8,0.98,1000.0,10000.0,0); > TCanvas* micanvas = new TCanvas(); > chi2->Draw(); > > > } > > >
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