// $Id$ //----------------------------------------------------------------------- // The GSI Online Offline Object Oriented (Go4) Project // Experiment Data Processing at EE department, GSI //----------------------------------------------------------------------- // Copyright (C) 2000- GSI Helmholtzzentrum für Schwerionenforschung GmbH // Planckstr. 1, 64291 Darmstadt, Germany // Contact: http://go4.gsi.de //----------------------------------------------------------------------- // This software can be used under the license agreements as stated // in Go4License.txt file which is part of the distribution. //----------------------------------------------------------------------- /* Go4Fit Examples This is small examples how to fit part of histogram with two gaussian and polynom function */ #ifndef __CINT__ #include "TH1.h" #include "TFile.h" #include "TApplication.h" #include "TGo4Fitter.h" void Example1(); int main(int argc, char **argv) { TApplication theApp("Application", 0, 0); Example1(); theApp.Run(); return 0; } #endif // routine to read histogram from examples file TH1D* GetHistogram(const char* HistogramName) { TFile* f1 = TFile::Open("histograms.root"); if (f1==0) return 0; TH1D* histo = (TH1D*) f1->Get(HistogramName); if (histo) histo->SetDirectory(0); return histo; } void Example1() { // create fitter, select fit function and add standard actions list TGo4Fitter fitter("Fitter", TGo4Fitter::ff_ML_Poisson, kTRUE); // add histogram to fitter, which should be fitted fitter.AddH1("data1", GetHistogram("hDeg120_P_c"), kTRUE, 2200., 2900.); // create polynom of first order fitter.AddPolynomX("data1", "Pol", 1); // create two gaussians fitter.AddGauss1("data1", "Gauss1", 2553., 15.); fitter.AddGauss1("data1", "Gauss2", 2672., 15.); // execute all actions fitter.DoActions(); // draw data, full model and two gaussains on new canvas fitter.Draw("#data1,Gauss1,Gauss2"); }