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RooExtendedTerm.h
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1/*****************************************************************************
2 * Project: RooFit *
3 * Package: RooFitCore *
4 * File: $Id$
5 * Authors: *
6 * WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu *
7 * DK, David Kirkby, UC Irvine, dkirkby@uci.edu *
8 * *
9 * Copyright (c) 2000-2005, Regents of the University of California *
10 * and Stanford University. All rights reserved. *
11 * *
12 * Redistribution and use in source and binary forms, *
13 * with or without modification, are permitted according to the terms *
14 * listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
15 *****************************************************************************/
16#ifndef ROO_EXTENDED_TERM
17#define ROO_EXTENDED_TERM
18
19#include "RooAbsPdf.h"
20#include "RooRealProxy.h"
21
22class RooExtendedTerm : public RooAbsPdf {
23public:
24
26 RooExtendedTerm(const char *name, const char *title, const RooAbsReal& n) ;
27 RooExtendedTerm(const RooExtendedTerm& other, const char* name=0) ;
28 virtual TObject* clone(const char* newname) const { return new RooExtendedTerm(*this,newname) ; }
29 virtual ~RooExtendedTerm() ;
30
31 Double_t evaluate() const { return 1. ; }
32
33 virtual ExtendMode extendMode() const { return CanBeExtended ; }
34 virtual Double_t expectedEvents(const RooArgSet* nset) const ;
35 virtual Double_t expectedEvents(const RooArgSet& nset) const {
36 // Return number of expected events, i.e. the value of the associated n parameter
37 return expectedEvents(&nset) ;
38 }
39
40protected:
41
42 RooRealProxy _n ; // Number of expected events
43
44 ClassDef(RooExtendedTerm,1) // Meta-p.d.f flat in all observables introducing only extended ML term
45};
46
47#endif
double Double_t
Definition: RtypesCore.h:57
#define ClassDef(name, id)
Definition: Rtypes.h:322
char name[80]
Definition: TGX11.cxx:109
@ CanBeExtended
Definition: RooAbsPdf.h:229
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:60
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgSet.h:28
RooExtendedTerm is a p.d.f with no observables that only introduces an extended ML term for a given n...
Double_t evaluate() const
Evaluate this PDF / function / constant. Needs to be overridden by all derived classes.
virtual ~RooExtendedTerm()
Destructor.
virtual ExtendMode extendMode() const
RooRealProxy _n
RooExtendedTerm()
Constructor.
virtual Double_t expectedEvents(const RooArgSet &nset) const
virtual Double_t expectedEvents(const RooArgSet *nset) const
Return number of expected events from associated event count variable.
virtual TObject * clone(const char *newname) const
Mother of all ROOT objects.
Definition: TObject.h:37
const Int_t n
Definition: legend1.C:16