test/utilities/RooPowLaw.cxx

0001  /*****************************************************************************
0002   * Project: RooFit                                                           *
0003   *                                                                           *
0004   * Copyright (c) 2000-2005, Regents of the University of California          *
0005   *                          and Stanford University. All rights reserved.    *
0006   *                                                                           *
0007   * Redistribution and use in source and binary forms,                        *
0008   * with or without modification, are permitted according to the terms        *
0009   * listed in LICENSE (http://roofit.sourceforge.net/license.txt)             *
0010   *****************************************************************************/
0011
0012  // -- CLASS DESCRIPTION [PDF] --
0013  // Your description goes here...
0014
0015  #include "Riostream.h"
0016
0017  #include "RooPowLaw.h"
0018  #include "RooAbsReal.h"
0019  #include "RooAbsCategory.h"
0020
0021  ClassImp(RooPowLaw);
0022
0023  RooPowLaw::RooPowLaw(const char *name, const char *title,
0024                       RooAbsReal& _m,
0025                       RooAbsReal& _alpha
0026 ) :
0027    RooAbsPdf(name,title),
0028    m("m","m",this,_m),
0029     alpha(" alpha"," alpha",this,_alpha)
0030 {
0031  }
0032
0033
0034  RooPowLaw::RooPowLaw(const RooPowLaw& other, const char* name) :
0035    RooAbsPdf(other,name),
0036     m("m",this,other.m),
0037     alpha(" alpha",this,other. alpha)
0038  {
0039  }
0040
0041
0042
0043  Double_t RooPowLaw::evaluate() const
0044  {
0045    // ENTER EXPRESSION IN TERMS OF VARIABLE ARGUMENTS HERE
0046
0047
0048    if(m <= 0.0 ){ return 1000.0; }
0049    else{ return TMath::Power(m, alpha); }
0050  }
0051
0052
0053