Spline example

#include <iostream>
#include <iomanip>

#include "Spline.hpp"

int main() {
    std::vector<double> X = { -1, -0.5, 0, 0.5, 1 };
    std::vector<double> Y = {  0,    0, 1,   0, 0 };

    tk::spline s;

    s.set_points(X, Y);    // X needs to be sorted, strictly increasing
    //double value = s(1.5);  // interpolated value at 1.5

    for (double i = -1; i < 1; i += 0.01) {
        std::cout << i << "\t" << s(i) << std::endl;
    }

    return 0;
}