<commit_before>

#include "Math/RMinimizer.h"
#include "Math/IFunction.h"
#include <TVectorD.h>
#include "Math/BasicMinimizer.h"
//#include "Math/MultiNumGradFunction.h"

namespace ROOT {
   namespace Math{

      const ROOT::Math::IMultiGenFunction *gFunction;
      const ROOT::Math::IMultiGradFunction *gGradFunction;

      double minfunction(TVectorD x){
	return (*gFunction)(x.GetMatrixArray());
      }
      TVectorD mingradfunction(TVectorD y){
         return gGradFunction->Gradient(y);
      }


RMinimizer::RMinimizer(Option_t *method){
	fMethod=method;
        if (fMethod.empty() ) fMethod="BFGS";

}

void RMinimizer::SetFunction(const ROOT::Math::IMultiGenFunction & func) { 
   // set the function to minimizer 
   // need to calculate numerically the derivatives: do via class MultiNumGradFunction
   gFunction = &func;
   //ROOT::Math::MultiNumGradFunction gradFunc(func); 
   // function is cloned inside so can be delete afterwards
   // called base class method setfunction 
   // (note: write explicitly otherwise it will call back itself)
   BasicMinimizer::SetFunction(func);
}

//SetFunctions

bool RMinimizer::Minimize()   {


   (gFunction)= ObjFunction();
   (gGradFunction) = GradObjFunction();
/*
 *"Nelder-Mead", "BFGS", "CG", "L-BFGS-B", "SANN", "Brent" (Brent only for 1D minimization)
 */	<commit_msg>bug fixes<commit_after>

#include "Math/RMinimizer.h"
#include "Math/IFunction.h"
#include <TVectorD.h>
#include "Math/BasicMinimizer.h"
//#include "Math/MultiNumGradFunction.h"

namespace ROOT {
   namespace Math{

      const ROOT::Math::IMultiGenFunction *gFunction;
      const ROOT::Math::IMultiGradFunction *gGradFunction;

      double minfunction(TVectorD x){
	return (*gFunction)(x.GetMatrixArray());
      }
      TVectorD mingradfunction(TVectorD y){
         return gGradFunction->Gradient(y,NDim());
      }


RMinimizer::RMinimizer(Option_t *method){
	fMethod=method;
        if (fMethod.empty() ) fMethod="BFGS";

}

void RMinimizer::SetFunction(const ROOT::Math::IMultiGenFunction & func) { 
   // set the function to minimizer 
   // need to calculate numerically the derivatives: do via class MultiNumGradFunction
   gFunction = &func;
   //ROOT::Math::MultiNumGradFunction gradFunc(func); 
   // function is cloned inside so can be delete afterwards
   // called base class method setfunction 
   // (note: write explicitly otherwise it will call back itself)
   BasicMinimizer::SetFunction(func);
}

//SetFunctions

bool RMinimizer::Minimize()   {


   (gFunction)= ObjFunction();
   (gGradFunction) = GradObjFunction();
/*
 *"Nelder-Mead", "BFGS", "CG", "L-BFGS-B", "SANN", "Brent" (Brent only for 1D minimization)
 */	
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