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Bonjour Marie,<br>
<br>
On 05/01/2012 06:40, Marie de Flaugergues wrote:
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<div class="WordSection1">
<p class="MsoNormal">Bonjour<o:p></o:p></p>
<p class="MsoNormal">Effectivement dans la fonction mapsound, z
est négatif car voila ce qui est écrit ligne 44 de cette
fonction<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 9.5pt; font-family:
"Monospaced","serif"; color: rgb(50,
185, 185);">grayplot</span><span style="font-size: 9.5pt;
font-family: "Monospaced","serif";
color: rgb(74, 85, 219);">(</span><span style="font-size:
9.5pt; font-family:
"Monospaced","serif"; color: black;">x_abs,y_abs,</span><span
style="font-size: 9.5pt; font-family:
"Monospaced","serif"; color: rgb(92, 92,
92);">-</span><span style="font-size: 9.5pt; font-family:
"Monospaced","serif"; color: black;">M</span><span
style="font-size: 9.5pt; font-family:
"Monospaced","serif"; color: rgb(74, 85,
219);">)</span></p>
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</blockquote>
<br>
Ceci est juste une astuce pour "inverser" les couleurs. Un petit
exemple:<br>
x = -1:0.01:1;<br>
y = x;<br>
z = sqrt(ones(x') .*. x .^ 2 + ones(y) .*. y' .^ 2);<br>
f = figure();<br>
f.color_map = graycolormap(255);<br>
subplot(211);<br>
grayplot(x,y,z);<br>
subplot(212);<br>
grayplot(x,y,-z);<br>
f.background = color(255,255,255);<br>
<br>
Cordialement,<br>
<br>
Calixte<br>
<br>
<blockquote cite="mid:024d01cccb6c$8f3bcff0$adb36fd0$@fr"
type="cite">
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<p class="MsoNormal"><span style="font-size: 9.5pt; font-family:
"Monospaced","serif"; color: rgb(74, 85,
219);"><o:p></o:p></span></p>
<p class="MsoNormal">Connaissez vous la raison de ce choix ? <o:p></o:p></p>
<p class="MsoNormal">Pour moi z représente l’amplitude pour une
fréquence donnée à un instant donné et devrait être positif<o:p></o:p></p>
<p class="MsoNormal">Merci d’avance<o:p></o:p></p>
<p class="MsoNormal">Cordialement<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-size: 11pt; color:
rgb(0, 176, 80);">_______________________________<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt;"><o:p> </o:p></span></p>
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<p class="MsoNormal" style=""><b><span
style="font-size: 11pt; font-family:
"Times New
Roman","serif"; color:
rgb(0, 176, 80);"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style=""><b><span
style="font-size: 8pt; font-family:
"Times New
Roman","serif"; color:
rgb(0, 176, 80);">Marie de Flaugergues<o:p></o:p></span></b></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt;"><o:p> </o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 11pt;"><o:p> </o:p></span></p>
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height: 83.25pt;" valign="top" width="146"><br>
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<td style="width: 109.8pt; padding: 0cm 5.4pt; height:
83.25pt;" valign="top" width="146"><br>
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<p class="MsoNormal" style="text-align: center;" align="center"><span
style="font-size: 11pt;"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif"; color:
windowtext;">De :</span></b><span style="font-size:
10pt; font-family:
"Tahoma","sans-serif"; color:
windowtext;"> Adrien Vogt-Schilb
[<a class="moz-txt-link-freetext" href="mailto:vogt@centre-cired.fr">mailto:vogt@centre-cired.fr</a>] <br>
<b>Envoyé :</b> mercredi 4 janvier 2012 18:07<br>
<b>À :</b> <a class="moz-txt-link-abbreviated" href="mailto:users-fr@lists.scilab.org">users-fr@lists.scilab.org</a><br>
<b>Objet :</b> Re: [users-fr] affichage colorbar<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Bonjour<br>
<br>
En lançant l'exemple de Serge, j'obtiens une colorbar dont la
valeur la plus basse -0.26, est en bas; et la valeur plus
haute, -0.00029 est en haut. Avez vous bien vu qu'il s'agit de
nombre négatifs?<br>
<br>
Serge, help mapsound ne documente pas w.<br>
<br>
<br>
On 04/01/2012 18:00, Marie de Flaugergues wrote: <o:p></o:p></p>
<p class="MsoNormal">Bonjour<o:p></o:p></p>
<p class="MsoNormal">Merci de cette réponse, c’était bien ce que
je cherchais.<o:p></o:p></p>
<p class="MsoNormal">Encore une question.<o:p></o:p></p>
<p class="MsoNormal">Est-ce que l’un d’entre vous c’est inverser
l’affichage (haut<->bas) de la colorbar ?<o:p></o:p></p>
<p class="MsoNormal">En effet les valeurs les plus basse sont
affichées en haut et non en bas.<o:p></o:p></p>
<p class="MsoNormal">Merci<o:p></o:p></p>
<p class="MsoNormal">Cordialement<o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size: 11pt; color:
rgb(0, 176, 80);">M de flaugergues</span><o:p></o:p></p>
</div>
<p class="MsoNormal" style="text-align: center;" align="center"><span
style="font-size: 11pt;"> </span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Je suppose que vous voulez parler de la
fonction mapsound et non de analyze.<br>
analyze fait essentiellement une décomposition en serie de
fourier du signal et en affiche le module<br>
<br>
Le code couleur de mapsound depend de la table de couleur qui
a été definie pour la fenetre graphique. on peut compléter
l'exemple donné dans la page d'aide de mapsound pour afficher
une colorbar :<br>
<br>
t=soundsec(0.5);<br>
<br>
// Then we generate the sound.<br>
s=sin(440*t)+sin(220*t)/2+sin(880*t)/2;<br>
[nr,nc]=size(t);<br>
s(nc/2:nc)=sin(330*t(nc/2:nc));<br>
f=gcf();clf;f.color_map=jetcolormap(32);<br>
<br>
mapsound(s);<br>
<br>
e=gce();colorbar(min(e.data.z),max(e.data.z));<br>
<br>
Serge Steer <br>
INRIA<o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><span
style="font-family: "Times New
Roman","serif"; color: rgb(51, 0, 0);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-family: "Times New
Roman","serif"; color: rgb(51, 0, 0);">-- <br>
Adrien Vogt-Schilb (Cired) <br>
Tel: (+33) 1 43 94 <b>73 77</b><o:p></o:p></span></p>
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</blockquote>
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