File:Lissage sinus bruite spline cubique.svg
Summary
| Description |
English: Noisy sine function smoothed by a cubic Hermite spline.
Français : Fonction sinus bruitée lissée par une spline cubique de Hermite. |
| Date | |
| Source | Own work |
| Author | Christophe Dang Ngoc Chan (Cdang) |
| Other versions | same data with moving averages smoothing: File:Lissage sinus bruite moyenne glissante.svg |
Scilab source
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This media was created with Scilab, a free open-source software. Here is a listing of the Scilab source used to create this file. |
// ***** Génération des données *****
m = 200; // nombre de points mesurés
bruit = 0.2; // amplitude du bruit
x = linspace(0, 2*%pi, m);
y = sin(x) + 0.2*rand(x, "normal"); // valeurs bruitées
// ***** Détermination de la spline *****
n = 6; // nombre de points de contrôle de la spline
xs = linspace(x(1), x($), n); // abscisse des points de contrôle
// répartition uniforme
[ys, d] = lsq_splin(x, y, xs); // détermination de la spline
// ***** Calcul des valeurs lissées de y *****
yliss = interp(x, xs, ys, d); // calcul des données lissées
// ***** Tracé *****
plot(x, y) // données originales
plot(x, yliss, "r") // données lissées
Licensing
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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