File:Signal gaussien.png
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Signal_gaussien.png (610 × 461 pixels, file size: 6 KB, MIME type: image/png)
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Summary[edit]
Signal avec un bruit gaussien ; moyenne m = 5, écart type σ = 1
Signal with a gaussian noise; average m = 5, standard deviation σ = 1
Auteur/author : Christophe Dang Ngoc Chan (cdang)
réalisé avec/made with Scilab
clear;clf; n=50; // moitié du nombre de points aléatoires // Gaussienne normée *3 centrée sur 5, écart type 1 deff('[y]=gauss(x)','y=3/(2*%pi)*exp(-0.5*(x-5)^2)') // nombres aléatoires, loi uniforme x1=rand(n,1); x2=rand(n,1); x=[2:0.1:8]'; // méthode de Box-Muller // on peut aussi faire directement // y1=rand(2*n,1,'normal') for i=1:n y1(i)=sqrt(-2*log(x1(i)))*cos(2*%pi*x2(i))+5; y1(i+n)=sqrt(-2*log(x1(i)))*sin(2*%pi*x2(i))+5; end // histogramme subplot(2,1,1) histplot(20,y1) fplot2d(x,gauss,style=2) xtitle('Répartition des valeurs du signal','intensité', 'probabilité') // signal subplot(2,1,2) plot(y1) xtitle('Signal','temps', 'intensité')
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I, the copyright holder of this work, hereby publish it under the following license:
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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 13:18, 21 October 2005 | 610 × 461 (6 KB) | Cdang (talk | contribs) | Signal avec un bruit gaussien ---- Signal with a gaussian noise Auteur/author : Christophe Dang Ngoc Chan (user:cdang) |
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