Dear ROOTer's My fitting process is like followed: (1). Generate a histogram with 1000 Monte Carlo entries and fit it with my function. (2). Generate a second histogram with another 1000 entries and do the same fitting. (3). repeat this process 200 times. Specifically, the code is more or less like followed. During the loop from 0 to 200, when i=0, everything is OK but when i>0, ROOT start to give messages: >>>> Function: myfunction cannot be compiled. please do some help for this problem ! Sincerely, Xie ---------- The code | ------------------------- Double_t myfunction(Double_t *x, Double_t *par) // Fitting function. { .........................................} void fit() { ................... for(int i=0;i<=200;i++) //*****> repeat fitting 200 times { ................... fpx = new TH1F("fpx","",BinNum, Xmin,Xmax); for(int j=0;j<1000;j++) fpx->Fill(....); //****> 1000 Monte Carlo Events FitFunc = new TF1("myfunction",myfunction,-10,20,2); FitFunc->SetParameter(0.5,0.1); FitFunc->SetParNames("Normalize","Most Probable"); fpx->Fit("myfunction","r"); delete fpx; delete FitFunc; } }
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