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/Go4FitExample/TModelTemplate.cxx

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00001 //---------------------------------------------------------------
00002 //        Go4 Release Package v2.10-5 (build 21005) 
00003 //                      03-Nov-2005
00004 //---------------------------------------------------------------
00005 //       The GSI Online Offline Object Oriented (Go4) Project
00006 //       Experiment Data Processing at DVEE department, GSI
00007 //---------------------------------------------------------------
00008 //
00009 //Copyright (C) 2000- Gesellschaft f. Schwerionenforschung, GSI
00010 //                    Planckstr. 1, 64291 Darmstadt, Germany
00011 //Contact:            http://go4.gsi.de
00012 //----------------------------------------------------------------
00013 //This software can be used under the license agreements as stated
00014 //in Go4License.txt file which is part of the distribution.
00015 //----------------------------------------------------------------
00016 /* template for user model class
00017    The only function, which should be redefined by used - UserFunction()
00018    In given example constructor provides a general interface to create
00019    several parameters. Amplitude parameters can be add, if necessary.
00020    Any kind of other constructors with predefine parameters set and names can be invented
00021    Here user function is Gaussian
00022 */
00023 
00024 
00025 #include "TString.h"
00026 #include "TMath.h"
00027 #include "TModelTemplate.h"
00028 
00029 TModelTemplate::TModelTemplate(const char* iName, Int_t iNPars, Bool_t AddAmplitude) :
00030    TGo4FitModel(iName,"Template for user model",AddAmplitude) {
00031    for (Int_t n=0;n<iNPars;n++) {
00032        TString s("Par"); s+=n;
00033        NewParameter(s.Data(),"model template parameter",0.);
00034    }
00035 }
00036 
00037 Double_t TModelTemplate::UserFunction(Double_t* Coordinates, Double_t* Parameters) {
00038    Double_t pos = Parameters[0];
00039    Double_t width = Parameters[1];
00040    Double_t x = Coordinates[0];
00041    return TMath::Exp(-0.5*(x-pos)*(x-pos)/width/width);
00042 }
00043 
00044 ClassImp(TModelTemplate)
00045 
00046 //----------------------------END OF GO4 SOURCE FILE ---------------------

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