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RooAbsIntegrator.cxx
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1/*****************************************************************************
2 * Project: RooFit *
3 * Package: RooFitCore *
4 * @(#)root/roofitcore:$Id$
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
17/**
18\file RooAbsIntegrator.cxx
19\class RooAbsIntegrator
20\ingroup Roofitcore
21
22RooAbsIntegrator is the abstract interface for integrators of real-valued
23functions that implement the RooAbsFunc interface.
24**/
25
26#include "RooFit.h"
27
28#include "Riostream.h"
29
30
31#include "RooAbsIntegrator.h"
32#include "RooMsgService.h"
33#include "TClass.h"
34
35using namespace std;
36
38;
39
40
41////////////////////////////////////////////////////////////////////////////////
42/// Default constructor
43
44RooAbsIntegrator::RooAbsIntegrator() : _function(0), _valid(kFALSE), _printEvalCounter(kFALSE)
45{
46}
47
48
49
50////////////////////////////////////////////////////////////////////////////////
51/// Copy constructor
52
54 _function(&function), _valid(function.isValid()), _printEvalCounter(doPrintEvalCounter)
55{
56}
57
58
59
60////////////////////////////////////////////////////////////////////////////////
61/// Calculate integral value with given array of parameter values
64{
66
67 integrand()->saveXVec() ;
68 Double_t ret = integral(yvec) ;
70
71 cxcoutD(NumIntegration) << IsA()->GetName() << "::calculate(" << _function->getName() << ") number of function calls = " << integrand()->numCall()<<", result = "<<ret << endl ;
72 return ret ;
73}
74
75
76
77////////////////////////////////////////////////////////////////////////////////
78/// Interface to set limits on integration
79
81{
82 return setLimits(&xmin,&xmax) ;
83}
84
85
86
87////////////////////////////////////////////////////////////////////////////////
88/// Interface function that allows to defer limit definition to integrand definition
89
91{
92 return kFALSE ;
93}
#define cxcoutD(a)
Definition: RooMsgService.h:81
const Bool_t kFALSE
Definition: RtypesCore.h:90
bool Bool_t
Definition: RtypesCore.h:61
double Double_t
Definition: RtypesCore.h:57
#define ClassImp(name)
Definition: Rtypes.h:361
float xmin
Definition: THbookFile.cxx:93
float xmax
Definition: THbookFile.cxx:93
Abstract interface for evaluating a real-valued function of one real variable and performing numerica...
Definition: RooAbsFunc.h:23
virtual void saveXVec() const
Definition: RooAbsFunc.h:51
void resetNumCall() const
Definition: RooAbsFunc.h:46
Int_t numCall() const
Definition: RooAbsFunc.h:42
virtual void restoreXVec() const
Definition: RooAbsFunc.h:54
virtual const char * getName() const
Definition: RooAbsFunc.h:59
RooAbsIntegrator is the abstract interface for integrators of real-valued functions that implement th...
virtual Double_t integral(const Double_t *yvec=0)=0
const RooAbsFunc * _function
RooAbsIntegrator()
Default constructor.
virtual Bool_t setUseIntegrandLimits(Bool_t flag)
Interface function that allows to defer limit definition to integrand definition.
const RooAbsFunc * integrand() const
Double_t calculate(const Double_t *yvec=0)
Calculate integral value with given array of parameter values.
virtual Bool_t setLimits(Double_t *, Double_t *)
void function(const Char_t *name_, T fun, const Char_t *docstring=0)
Definition: RExports.h:151
@ NumIntegration
Definition: RooGlobalFunc.h:69