intrp::CubicSpline Class Reference

A natural cubic spline interpolation class. More...

#include <CubicSpline.hpp>

Public Member Functions
	CubicSpline (std::vector< double > x_values, std::vector< double > y_values) noexcept
	CubicSpline (const CubicSpline &)=delete
CubicSpline &	operator= (const CubicSpline &)=delete
	CubicSpline (CubicSpline &&) noexcept=default
CubicSpline &	operator= (CubicSpline &&rhs) noexcept=default
double	operator() (double x_to_interp_to) const noexcept
void	pup (PUP::er &p) noexcept

Detailed Description

A natural cubic spline interpolation class.

The class builds a cubic spline interpolant with natural boundary conditions using the x_values and y_values passed into the constructor. For details on the algorithm see the GSL documentation on gsl_interp_cspline.

Here is an example how to use this class:

  intrp::CubicSpline interpolant{x_values, y_values};
  const double x_to_interpolate_to =
      lower_bound + (upper_bound - lower_bound) / 2.;
  CHECK(interpolant(x_to_interpolate_to) ==
        custom_approx_interior(function(x_to_interpolate_to)));