fx.h

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#ifndef FX_H
#define FX_H
 
#define _USE_MATH_DEFINES
#include <math.h>
 
#include <assert.h>
#include <armadillo>
 
using namespace std;
using namespace arma;
 
class FX
{
public:
    FX(colvec(*f) (colvec &x, colvec &some_constants));
    
    ~FX();
 
    mat JacobianAt(colvec &x, colvec &some_constants);
    
    mat HessianAt(colvec &x, colvec &some_constants, int i);
     
    colvec SolveAt(colvec &x, colvec &some_constants);
 
    void SetEpsilon(double epsilon);
 
private: 
    colvec (*F_) (colvec &x, colvec &some_constants); 
 
    double Epsilon_; 
};
 
#endif