SavitskyGolay.h

#ifndef SAVITZKYGOLAY_H
#define SAVITZKYGOLAY_H
 
#include <vector>
 
#include "internal/Point.h"
 
struct Point;
 
class SavitzkyGolay {
   private:
    int window_size_;
    int window_radius_;  // half window size
    int poly_order_;
    std::vector<float> coeffs_;
 
    std::vector<std::vector<float>> invert_matrix(std::vector<std::vector<float>> A);
    void compute_coefficients();
 
   public:
    SavitzkyGolay(int radius, int poly_order);
    std::vector<Point> filter(const std::vector<Point> &data);
    std::vector<Point> filter_wrap(const std::vector<Point> &data);
    std::vector<float> get_coeffs() const {
        return coeffs_;
    }
};
 
#endif  // SAVITZKYGOLAY_H