E:/dev/eLynx/include/elx/math/IFunctionNL.h

//============================================================================
//  IFunctionNL.h                                       Math.Component package
//============================================================================
//  Usage : interface of non-linear function of n-variables and m-parameters
//          non-linearity is in the meaning of parameters, not variables
//          used as the input to non-linear function fitting
//----------------------------------------------------------------------------
//  Copyright (C) 2006 by eLynx project
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Library General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//
//  This library 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 Library General Public License for more details.
//----------------------------------------------------------------------------
#ifndef __IFunctionNL_h__
#define __IFunctionNL_h__

#include <elx/math/IVector.h>

namespace eLynx {
namespace Math {
  
class ExportedByMath IFunctionNL {

public:

  virtual ~IFunctionNL() {}

  virtual uint32 GetVariablesCount() const = 0;
  
  virtual uint32 GetParametersCount() const = 0;
  
  virtual double Evaluate(const IVector &iVars, 
    const IVector &iParams) const = 0;
    
  virtual double EvalDerivativeByParam(const IVector &iVars, 
    const IVector &iParams, uint32 iByParam) const = 0;  
};

} // namespace Math
} // namespace eLynx

#endif //__IFunctionNL_h__