File:Signal bruite cumule.png
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Signal_bruite_cumule.png (610 × 461 pixels, file size: 6 KB, MIME type: image/png)
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[edit]Cumul du signal dans le temps pour éliminer la partie aléatoire et garder la partie constante.
- valeur instantanée du signal
- valeur cumulée du signal
- valeur moyenne du signal
Accumulation of the signal with the time to eliminate the random noise and keep the constant part
- instant value of the signal
- cumulated value of the signal
- average value of the signal
Auteur/author : Christophe Dang Ngoc Chan (cdang)
Réalisé à l'aide/made with help of Scilab
clear;clf; n=25; // moitié du nombre de points aléatoires // 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 // signal cumulé et moyenne y2(1)=y1(1);y3(1)=y1(1); for i=2:2*n y2(i)=y2(i-1)+y1(i); y3(i)=y2(i)/i; end // signal subplot(3,1,1) plot(y1) xtitle('Signal','temps', 'intensité') // signal cumulé subplot(3,1,2) plot(y2) xtitle('Signal cumulé','temps', 'intégrale de l''intensité') // signal moyen subplot(3,1,3) plot(y3) xtitle('Moyenne temporelle du signal','temps', 'moyenne de l''intensité')
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:13, 24 October 2005 | 610 × 461 (6 KB) | Cdang (talk | contribs) | slight modification | |
09:58, 24 October 2005 | 610 × 461 (6 KB) | Cdang (talk | contribs) | Cumul du signal dans le temps pour éliminer la partie aléatoire et garder la partie constante. # valeur instantanée du signal <math>I(t)</math> # valeur cumulée du signal <math>\int_0^\tau I(t)\cdot dt</math> # valeur moyenne du signal <math>\frac{1}{ |
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