See the following in the TF1 documentation ... Fernanda Gallinucci Garcia wrote: > > Hi, > > I fitted two 8th degree polinomial to my data. Now, > I would like to compare these 2 curves. I created another function > that is the combo of the first two. Root crashes. > Why can't a TF1 object reference to other TF1 if is a polN? > > Is there a way to make this comparison? What should I do? > Thanks // // TF1 objects can reference other TF1 objects (thanks John Odonnell) // of type A or B defined above.This excludes CINT interpreted functions // and compiled functions. // However, there is a restriction. A function cannot reference a basic // function if the basic function is a polynomial polN. // Example: //{ // TF1 *fcos = new TF1 ("fcos", "[0]*cos(x)", 0., 10.); // fcos->SetParNames( "cos"); // fcos->SetParameter( 0, 1.1); // // TF1 *fsin = new TF1 ("fsin", "[0]*sin(x)", 0., 10.); // fsin->SetParNames( "sin"); // fsin->SetParameter( 0, 2.1); // // TF1 *fsincos = new TF1 ("fsc", "fcos+fsin"); // // TF1 *fs2 = new TF1 ("fs2", "fsc+fsc"); //} // Rene Brun
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