DavidonErrorUpdator.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_DavidonErrorUpdator
#define ROOT_Minuit2_DavidonErrorUpdator
 
#include "Minuit2/MinimumErrorUpdator.h"
 
namespace ROOT {
 
   namespace Minuit2 {
 
 
/**
   Update of the covariance matrix for the Variable Metric minimizer (MIGRAD)
 */
class DavidonErrorUpdator : public MinimumErrorUpdator {
 
public:
 
  DavidonErrorUpdator() {}
 
  virtual ~DavidonErrorUpdator() {}
 
  virtual MinimumError Update(const MinimumState&, const MinimumParameters&,
                              const FunctionGradient&) const;
 
private:
 
};
 
  }  // namespace Minuit2
 
}  // namespace ROOT
 
#endif  // ROOT_Minuit2_DavidonErrorUpdator