/usr/include/root/RooMCIntegrator.h is in libroot-roofit-dev 5.34.00-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Project: RooFit *
* Package: RooFitCore *
* File: $Id: RooMCIntegrator.h,v 1.15 2007/05/11 09:11:30 verkerke Exp $
* Authors: *
* WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu *
* DK, David Kirkby, UC Irvine, dkirkby@uci.edu *
* *
* Copyright (c) 2000-2005, Regents of the University of California *
* and Stanford University. All rights reserved. *
* *
* Redistribution and use in source and binary forms, *
* with or without modification, are permitted according to the terms *
* listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
*****************************************************************************/
#ifndef ROO_MC_INTEGRATOR
#define ROO_MC_INTEGRATOR
#include "RooAbsIntegrator.h"
#include "RooGrid.h"
#include "RooNumIntConfig.h"
#include "TStopwatch.h"
class RooMCIntegrator : public RooAbsIntegrator {
public:
// Constructors, assignment etc
enum SamplingMode { Importance, ImportanceOnly, Stratified };
enum GeneratorType { QuasiRandom, PseudoRandom };
RooMCIntegrator() ;
RooMCIntegrator(const RooAbsFunc& function, SamplingMode mode= Importance,
GeneratorType genType= QuasiRandom, Bool_t verbose= kFALSE);
RooMCIntegrator(const RooAbsFunc& function, const RooNumIntConfig& config);
virtual RooAbsIntegrator* clone(const RooAbsFunc& function, const RooNumIntConfig& config) const ;
virtual ~RooMCIntegrator();
virtual Bool_t checkLimits() const;
virtual Double_t integral(const Double_t* yvec=0);
enum Stage { AllStages, ReuseGrid, RefineGrid };
Double_t vegas(Stage stage, UInt_t calls, UInt_t iterations, Double_t *absError= 0);
Double_t getAlpha() const { return _alpha; }
void setAlpha(Double_t alpha) { _alpha= alpha; }
GeneratorType getGenType() const { return _genType; }
void setGenType(GeneratorType type) { _genType= type; }
const RooGrid &grid() const { return _grid; }
virtual Bool_t canIntegrate1D() const { return kTRUE ; }
virtual Bool_t canIntegrate2D() const { return kTRUE ; }
virtual Bool_t canIntegrateND() const { return kTRUE ; }
virtual Bool_t canIntegrateOpenEnded() const { return kFALSE ; }
protected:
friend class RooNumIntFactory ;
static void registerIntegrator(RooNumIntFactory& fact) ;
mutable RooGrid _grid; // Sampling grid definition
// control variables
Bool_t _verbose; // Verbosity control
Double_t _alpha; // Grid stiffness parameter
Int_t _mode; // Sampling mode
GeneratorType _genType; // Generator type
Int_t _nRefineIter ; // Number of refinement iterations
Int_t _nRefinePerDim ; // Number of refinement samplings (per dim)
Int_t _nIntegratePerDim ; // Number of integration samplings (per dim)
TStopwatch _timer; // Timer
Double_t _jac,_wtd_int_sum,_sum_wgts,_chi_sum,_chisq,_result,_sigma; // Scratch variables preserved between calls to vegas1/2/2
UInt_t _it_start,_it_num,_samples,_calls_per_box; // Scratch variables preserved between calls to vegas1/2/2
ClassDef(RooMCIntegrator,0) // VEGAS based multi-dimensional numerical integration engine
};
#endif
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