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RooGaussKronrodIntegrator1D.h
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1/*****************************************************************************
2 * Project: RooFit *
3 * Package: RooFitCore *
4 * File: $Id: RooGaussKronrodIntegrator1D.h,v 1.5 2007/05/11 09:11:30 verkerke 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_GAUSS_KRONROD_INTEGRATOR_1D
17#define ROO_GAUSS_KRONROD_INTEGRATOR_1D
18
19#include "RooAbsIntegrator.h"
20#include "RooNumIntConfig.h"
21
22double RooGaussKronrodIntegrator1D_GSL_GlueFunction(double x, void *data) ;
23
25public:
26
27 // Constructors, assignment etc
29 RooGaussKronrodIntegrator1D(const RooAbsFunc& function, const RooNumIntConfig& config) ;
31 virtual RooAbsIntegrator* clone(const RooAbsFunc& function, const RooNumIntConfig& config) const ;
33
34 virtual Bool_t checkLimits() const;
35 virtual Double_t integral(const Double_t *yvec=0) ;
36
39 virtual Bool_t setUseIntegrandLimits(Bool_t flag) {_useIntegrandLimits = flag ; return kTRUE ; }
40
41 virtual Bool_t canIntegrate1D() const { return kTRUE ; }
42 virtual Bool_t canIntegrate2D() const { return kFALSE ; }
43 virtual Bool_t canIntegrateND() const { return kFALSE ; }
44 virtual Bool_t canIntegrateOpenEnded() const { return kTRUE ; }
45
46protected:
47
48 friend class RooNumIntFactory ;
49 static void registerIntegrator(RooNumIntFactory& fact) ;
50
51 friend double RooGaussKronrodIntegrator1D_GSL_GlueFunction(double x, void *data) ;
52
54
55 Bool_t _useIntegrandLimits; // Use limits in function binding?
56
57 Double_t* xvec(Double_t& xx) { _x[0] = xx ; return _x ; }
58 Double_t *_x ; //! do not persist
59
60 Double_t _epsAbs ; // Absolute precision
61 Double_t _epsRel ; // Relative precision
62
63 mutable Double_t _xmin; //! Lower integration bound
64 mutable Double_t _xmax; //! Upper integration bound
65
66 ClassDef(RooGaussKronrodIntegrator1D,0) // 1-dimensional Gauss-Kronrod numerical integration engine
67};
68
69#endif
double RooGaussKronrodIntegrator1D_GSL_GlueFunction(double x, void *data)
const Bool_t kFALSE
Definition: RtypesCore.h:90
bool Bool_t
Definition: RtypesCore.h:61
double Double_t
Definition: RtypesCore.h:57
const Bool_t kTRUE
Definition: RtypesCore.h:89
#define ClassDef(name, id)
Definition: Rtypes.h:322
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
RooAbsIntegrator is the abstract interface for integrators of real-valued functions that implement th...
virtual Bool_t setLimits(Double_t *, Double_t *)
RooGaussKronrodIntegrator1D implements the Gauss-Kronrod integration algorithm.
virtual Bool_t setUseIntegrandLimits(Bool_t flag)
Interface function that allows to defer limit definition to integrand definition.
friend double RooGaussKronrodIntegrator1D_GSL_GlueFunction(double x, void *data)
Bool_t initialize()
Perform one-time initialization of integrator.
RooGaussKronrodIntegrator1D()
coverity[UNINIT_CTOR] Default constructor
Double_t _xmax
Lower integration bound.
virtual RooAbsIntegrator * clone(const RooAbsFunc &function, const RooNumIntConfig &config) const
Clone integrator with given function and configuration. Needed for RooNumIntFactory.
virtual Bool_t canIntegrateOpenEnded() const
virtual Bool_t checkLimits() const
Check that our integration range is finite and otherwise return kFALSE.
virtual Double_t integral(const Double_t *yvec=0)
Calculate and return integral.
Bool_t setLimits(Double_t *xmin, Double_t *xmax)
Change our integration limits.
static void registerIntegrator(RooNumIntFactory &fact)
Register RooGaussKronrodIntegrator1D, its parameters and capabilities with RooNumIntConfig.
RooNumIntConfig holds the configuration parameters of the various numeric integrators used by RooReal...
RooNumIntFactory is a factory to instantiate numeric integrators from a given function binding and a ...
Double_t x[n]
Definition: legend1.C:17