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RooCBShape.h
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1/*****************************************************************************
2 * Project: RooFit *
3 * Package: RooFitModels *
4 * File: $Id: RooCBShape.h,v 1.11 2007/07/12 20:30:49 wouter Exp $
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_CB_SHAPE
17#define ROO_CB_SHAPE
18
19#include "RooAbsPdf.h"
20#include "RooRealProxy.h"
21
22class RooRealVar;
23
24class RooCBShape : public RooAbsPdf {
25public:
27 RooCBShape(const char *name, const char *title, RooAbsReal& _m,
28 RooAbsReal& _m0, RooAbsReal& _sigma,
29 RooAbsReal& _alpha, RooAbsReal& _n);
30
31 RooCBShape(const RooCBShape& other, const char* name = 0);
32 virtual TObject* clone(const char* newname) const { return new RooCBShape(*this,newname); }
33
34 inline virtual ~RooCBShape() { }
35
36 virtual Int_t getAnalyticalIntegral( RooArgSet& allVars, RooArgSet& analVars, const char* rangeName=0 ) const;
37 virtual Double_t analyticalIntegral( Int_t code, const char* rangeName=0 ) const;
38
39 // Optimized accept/reject generator support
40 virtual Int_t getMaxVal(const RooArgSet& vars) const ;
41 virtual Double_t maxVal(Int_t code) const ;
42
43protected:
44
45 Double_t ApproxErf(Double_t arg) const ;
46
52
53 Double_t evaluate() const;
55
56private:
57
58 ClassDef(RooCBShape,1) // Crystal Ball lineshape PDF
59};
60
61#endif
int Int_t
Definition: RtypesCore.h:45
double Double_t
Definition: RtypesCore.h:59
#define ClassDef(name, id)
Definition: Rtypes.h:325
char name[80]
Definition: TGX11.cxx:110
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:61
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgSet.h:35
PDF implementing the Crystal Ball line shape.
Definition: RooCBShape.h:24
virtual Double_t maxVal(Int_t code) const
Return maximum value for set of observables identified by code assigned in getMaxVal.
Definition: RooCBShape.cxx:190
virtual Double_t analyticalIntegral(Int_t code, const char *rangeName=0) const
Implements the actual analytical integral(s) advertised by getAnalyticalIntegral.
Definition: RooCBShape.cxx:111
RooRealProxy n
Definition: RooCBShape.h:51
Double_t evaluate() const
Evaluate this PDF / function / constant. Needs to be overridden by all derived classes.
Definition: RooCBShape.cxx:76
Double_t ApproxErf(Double_t arg) const
Definition: RooCBShape.cxx:40
RooRealProxy m0
Definition: RooCBShape.h:48
RooRealProxy m
Definition: RooCBShape.h:47
virtual Int_t getAnalyticalIntegral(RooArgSet &allVars, RooArgSet &analVars, const char *rangeName=0) const
Interface function getAnalyticalIntergral advertises the analytical integrals that are supported.
Definition: RooCBShape.cxx:101
virtual Int_t getMaxVal(const RooArgSet &vars) const
Advertise that we know the maximum of self for given (m0,alpha,n,sigma)
Definition: RooCBShape.cxx:178
RooSpan< double > evaluateSpan(RooBatchCompute::RunContext &evalData, const RooArgSet *normSet) const
Compute multiple values of Crystal ball Shape distribution.
Definition: RooCBShape.cxx:95
RooRealProxy sigma
Definition: RooCBShape.h:49
virtual ~RooCBShape()
Definition: RooCBShape.h:34
virtual TObject * clone(const char *newname) const
Definition: RooCBShape.h:32
RooRealProxy alpha
Definition: RooCBShape.h:50
RooRealVar represents a variable that can be changed from the outside.
Definition: RooRealVar.h:39
A simple container to hold a batch of data values.
Definition: RooSpan.h:34
Mother of all ROOT objects.
Definition: TObject.h:37
This struct enables passing computation data around between elements of a computation graph.
Definition: RunContext.h:31