Functor_Cost_Function_Gradient.h

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/*
Created on Fri Jun 26 14:13:26 2020
Copyright (C) 2020 Peter Rakyta, Ph.D.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see http://www.gnu.org/licenses/.

@author: Peter Rakyta, Ph.D.
*/
#ifndef FUNCTOR_COST_FUNCTION_GRADIENT_H_INCLUDED
#define FUNCTOR_COST_FUNCTION_GRADIENT_H_INCLUDED

#include <gsl/gsl_vector.h>
#include "qgd/common.h"

template<typename decomp_class>
class functor_grad {

protected:

    const gsl_vector* parameters;
    decomp_class* instance;
    gsl_vector* f;
    double* f0;
    double dparam;

public:

functor_grad( const gsl_vector* parameters_in, decomp_class* instance_in, gsl_vector* f_in, double* f0_in, double dparam_in );

void operator()( int i ) const;

};




#endif // FUNCTOR_COST_FUNCTION_GRADIENT_H_INCLUDED