// @(#)root/minuit2:$Id: MnStrategy.cxx 20880 2007-11-19 11:23:41Z rdm $
// Authors: M. Winkler, F. James, L. Moneta, A. Zsenei   2003-2005  

/**********************************************************************
 *                                                                    *
 * Copyright (c) 2005 LCG ROOT Math team,  CERN/PH-SFT                *
 *                                                                    *
 **********************************************************************/

#include "Minuit2/MnStrategy.h"

namespace ROOT {

   namespace Minuit2 {



MnStrategy::MnStrategy() {
   //default strategy
   SetMediumStrategy();
}


MnStrategy::MnStrategy(unsigned int stra) {
   //user defined strategy (0, 1, >=2)
   if(stra == 0) SetLowStrategy();
   else if(stra == 1) SetMediumStrategy();
   else SetHighStrategy();
}

void MnStrategy::SetLowStrategy() {
   // set low strategy (0) values
   fStrategy = 0;
   SetGradientNCycles(2);
   SetGradientStepTolerance(0.5);
   SetGradientTolerance(0.1);
   SetHessianNCycles(3);
   SetHessianStepTolerance(0.5);
   SetHessianG2Tolerance(0.1);
   SetHessianGradientNCycles(1);
}

void MnStrategy::SetMediumStrategy() {
   // set minimum strategy (1) the default
   fStrategy = 1;
   SetGradientNCycles(3);
   SetGradientStepTolerance(0.3);
   SetGradientTolerance(0.05);
   SetHessianNCycles(5);
   SetHessianStepTolerance(0.3);
   SetHessianG2Tolerance(0.05);
   SetHessianGradientNCycles(2);
}

void MnStrategy::SetHighStrategy() {
   // set high strategy (2)
   fStrategy = 2;
   SetGradientNCycles(5);
   SetGradientStepTolerance(0.1);
   SetGradientTolerance(0.02);
   SetHessianNCycles(7);
   SetHessianStepTolerance(0.1);
   SetHessianG2Tolerance(0.02);
   SetHessianGradientNCycles(6);
}

   }  // namespace Minuit2

}  // namespace ROOT
