MnLineSearch.h

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// @(#)root/minuit2:$Id$
// Authors: M. Winkler, F. James, L. Moneta, A. Zsenei   2003-2005
 
/**********************************************************************
 *                                                                    *
 * Copyright (c) 2005 LCG ROOT Math team,  CERN/PH-SFT                *
 *                                                                    *
 **********************************************************************/
 
#ifndef ROOT_Minuit2_MnLineSearch
#define ROOT_Minuit2_MnLineSearch
 
#include "Minuit2/MnMatrix.h"
 
namespace ROOT {
 
namespace Minuit2 {
 
class MnFcn;
class MinimumParameters;
class MnMachinePrecision;
class MnParabolaPoint;
 
/**
 
Implements a 1-dimensional minimization along a given direction
(i.e. quadratic interpolation) It is independent of the algorithm
that generates the direction vector. It brackets the 1-dimensional
Minimum and iterates to approach the real Minimum of the n-dimensional
function.
 
 
@author Fred James and Matthias Winkler; comments added by Andras Zsenei
and Lorenzo Moneta
 
@ingroup Minuit
 
*/
 
class MnLineSearch {
 
public:
   MnParabolaPoint operator()(const MnFcn &, const MinimumParameters &, const MnAlgebraicVector &, double,
                              const MnMachinePrecision &) const;
 
#ifdef USE_OTHER_LS
   MnParabolaPoint CubicSearch(const MnFcn &, const MinimumParameters &, const MnAlgebraicVector &, double, double,
                               const MnMachinePrecision &) const;
 
   MnParabolaPoint BrentSearch(const MnFcn &, const MinimumParameters &, const MnAlgebraicVector &, double, double,
                               const MnMachinePrecision &) const;
#endif
};
 
} // namespace Minuit2
 
} // namespace ROOT
 
#endif // ROOT_Minuit2_MnLineSearch