cost_func_diff.h

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#ifndef COST_FUNC_DIFF_H
#define COST_FUNC_DIFF_H
#include <cost_func.h>

namespace FullPhysics {

//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

class CostFuncDiff : public CostFunc {

public:


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  CostFuncDiff() 
    : CostFunc(), d_count(0)
  {}


  virtual ~CostFuncDiff() {}


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual blitz::Array<double, 1> gradient() = 0;


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual blitz::Array<double, 1> gradient_x(const blitz::Array<double, 1>& x)
  { parameters(x); return gradient(); }


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual void cost_gradient(
     double& c, blitz::Array<double, 1>& g);


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual void cost_gradient_x(const blitz::Array<double, 1>& x,
     double& c, blitz::Array<double, 1>& g)
  { parameters(x); cost_gradient(c,g); }


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual int num_der1_evaluations() const
  { return d_count; }


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual void zero_num_evaluations()
  { CostFunc::zero_num_evaluations(); d_count = 0; }


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual int gradient_size() const
  { return expected_parameter_size(); }


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual void print(std::ostream& Os) const 
  { Os << "CostFuncDiff"; }


protected:


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual void increment_num_der1_evaluations()
  { d_count++; }


//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  virtual void set_num_der1_evaluations(int count)
  { d_count = count; }


private:

  int d_count;

};
}
#endif