Barycentric Lagrange Interpolating Polynomials and Lebesgue Constant

Version 1.0.0.0 (2,33 ko) par Greg von Winckel
Computes lagrange interpolating polynomials and Lebesgue function/constant.
3.6
(5)
6,7K téléchargements
Mise à jour 8 mars 2004

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The first script, barylag.m, performs a barycentric lagrange interpolation on a for a set of given data. This approach follows from a paper by L. N. Trefethen (ref inside script comments), and is much faster than the previous script. Additionally, it has been vectorized to improve computation time even more. The second script, lebesgue.m is for computing the lebesgue function and constant for a set of nodes. If you want to interpolate data using barylag but are using some unusual set of nodes, use the second script to check the lebesgue constant ensure good numerical conditioning.

Citation pour cette source

Greg von Winckel (2024). Barycentric Lagrange Interpolating Polynomials and Lebesgue Constant (https://www.mathworks.com/matlabcentral/fileexchange/4478-barycentric-lagrange-interpolating-polynomials-and-lebesgue-constant), MATLAB Central File Exchange. Récupéré le .

Compatibilité avec les versions de MATLAB
Créé avec R12.1
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Inspiré par : Lagrange polynomial interpolation

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Version Publié le Notes de version
1.0.0.0

The script has been made into two scripts, a barycentric lagrange interpolation scheme which is much faster, and a lebesgue calculator for theoretical interest.