Chebyshev interpolation - johndcook.com
www.johndcook.com › 11 › 06Nov 06, 2017 · As you interpolate at the roots of higher and higher degree Chebyshev polynomials, the interpolants converge to the function being interpolated. The plot below shows how interpolating at the roots of T16, the 16th Chebyshev polynomial, eliminates the bad behavior at the ends. To make this plot, we replaced x above with the roots of T16 ...
numpy.polynomial.chebyshev.Chebyshev.interpolate — NumPy v1 ...
numpy.org › doc › stablemethod. classmethod polynomial.chebyshev.Chebyshev.interpolate(func, deg, domain=None, args=()) [source] ¶. Interpolate a function at the Chebyshev points of the first kind. Returns the series that interpolates func at the Chebyshev points of the first kind scaled and shifted to the domain. The resulting series tends to a minmax approximation ...