#ifndef __SGSMOOTH_HPP__
#define __SGSMOOTH_HPP__

#include <vector>

// savitzky golay smoothing.
std::vector<double> sg_smooth(const std::vector<double>& v, const int w,
                              const int deg);
//! numerical derivative based on savitzky golay smoothing.
std::vector<double> sg_derivative(const std::vector<double>& v, const int w,
                                  const int deg, const double h = 1.0);

#endif // __SGSMOOTH_HPP__