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<div class="moz-cite-prefix">Hi Stéphane</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">It looks very nice and I hope it will
be added to Scilab as proposed by your code review. Why does it
say in red print "Cannot Merge" ?<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">/Claus<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">On 16-03-2021 17:45, Stéphane Mottelet
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:db8455b3-1b4c-2717-03dd-ecbb90bb7a3e@utc.fr">
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<p>Hi</p>
<p>For real life signals you should rather use something like this
(Savitsky-Golay filters)<br>
</p>
<p><a class="moz-txt-link-freetext"
href="https://codereview.scilab.org/#/c/21499/"
moz-do-not-send="true">https://codereview.scilab.org/#/c/21499/</a></p>
<p>S.</p>
<div class="moz-cite-prefix">Le 16/03/2021 à 17:09, CHEZE David
227480 a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:C1165F01A4B61C48AF8B97D1C4AB348B9D3869B5@EXDAG0-B2.intra.cea.fr">
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<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US">Hi
Clément,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"
lang="EN-GB">Thank you for your quick reply and solution !
Actually it’s working for simple data but with noisy
experimental timeseries, some filtering is required to get
perfect regular signal (between the ‘true’ extrema) that
could be then managed by the routine. I suppose this is
something the Matlab/Octave is handling internally, with
some parameters as function’s argument to tune it, maybe
it’s not the case .<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"
lang="EN-GB">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"
lang="EN-GB">David<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="color:#1F497D;mso-fareast-language:EN-US"
lang="EN-GB"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b>De :</b> users <a
class="moz-txt-link-rfc2396E"
href="mailto:users-bounces@lists.scilab.org"
moz-do-not-send="true"><users-bounces@lists.scilab.org></a>
<b>De la part de</b> Clément David<br>
<b>Envoyé :</b> mardi 16 mars 2021 16:27<br>
<b>À :</b> Users mailing list for Scilab <a
class="moz-txt-link-rfc2396E"
href="mailto:users@lists.scilab.org"
moz-do-not-send="true"><users@lists.scilab.org></a><br>
<b>Objet :</b> Re: [Scilab-users] find and locate local
maxima<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hello David,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">After reading the
Matlab documentation page, it seems pretty simple to
implement using Scilab : and $ symbols:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced;color:#B01813"
lang="EN-US">function</span><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"> <span style="color:#4A55DB">[</span><b><span
style="color:#834310">pks</span></b><span
style="color:black">, </span><b><span
style="color:#834310">locs</span></b><span
style="color:#4A55DB">]</span><span
style="color:#5C5C5C">=</span><u><span
style="color:black">findpeaks</span></u><span
style="color:#4A55DB">(</span><b><span
style="color:#834310">data</span></b><span
style="color:#4A55DB">)</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"> <span style="color:black">ii</span> <span
style="color:#5C5C5C">=</span> <span
style="color:#32B9B9"> find</span><span
style="color:#4A55DB">(</span><span style="color:black">d</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">1</span><span
style="color:#FFAA00">:$</span><span
style="color:#5C5C5C">-</span><span
style="color:rosybrown">2</span><span
style="color:#4A55DB">)</span> <span
style="color:#5C5C5C"><</span> <span
style="color:black">d</span><span style="color:#4A55DB">(</span><span
style="color:rosybrown">2</span><span
style="color:#FFAA00">:$</span><span
style="color:#5C5C5C">-</span><span
style="color:rosybrown">1</span><span
style="color:#4A55DB">)</span> <span
style="color:#5C5C5C">&</span> <span
style="color:black">d</span><span style="color:#4A55DB">(</span><span
style="color:rosybrown">2</span><span
style="color:#FFAA00">:$</span><span
style="color:#5C5C5C">-</span><span
style="color:rosybrown">1</span><span
style="color:#4A55DB">)</span> <span
style="color:#5C5C5C">>=</span> <span
style="color:black">d</span><span style="color:#4A55DB">(</span><span
style="color:rosybrown">3</span><span
style="color:#FFAA00">:$</span><span
style="color:#4A55DB">))</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"> <b><span style="color:#834310">pks</span></b>
<span style="color:#5C5C5C">=</span> <b><span
style="color:#834310">data</span></b><span
style="color:#4A55DB">(</span><span style="color:black">ii</span><span
style="color:#5C5C5C">+</span><span
style="color:rosybrown">2</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"> <b><span style="color:#834310">locs</span></b>
<span style="color:#5C5C5C">=</span> <span
style="color:black">ii</span> <span
style="color:#5C5C5C">+</span> <span
style="color:rosybrown"> 2</span><span
style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced;color:#B01813"
lang="EN-US">endfunction</span><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced;color:black"
lang="EN-US">data</span><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"> <span style="color:#5C5C5C">=</span> <span
style="color:#4A55DB">[</span><span
style="color:rosybrown">25</span> <span
style="color:rosybrown">8</span> <span
style="color:rosybrown">15</span> <span
style="color:rosybrown"> 5</span> <span
style="color:rosybrown">6</span> <span
style="color:rosybrown">10</span> <span
style="color:rosybrown">10</span> <span
style="color:rosybrown">3</span> <span
style="color:rosybrown"> 1</span> <span
style="color:rosybrown">20</span> <span
style="color:rosybrown">7</span><span
style="color:#4A55DB">]</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><u><span
style="font-size:11.5pt;font-family:Monospaced;color:#AE5CB0"
lang="EN-US">plot</span></u><span
style="font-size:11.5pt;font-family:Monospaced;color:#4A55DB"
lang="EN-US">(</span><span
style="font-size:11.5pt;font-family:Monospaced;color:black"
lang="EN-US">data</span><span
style="font-size:11.5pt;font-family:Monospaced;color:#4A55DB"
lang="EN-US">)</span><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced;color:#4A55DB"
lang="EN-US">[</span><span
style="font-size:11.5pt;font-family:Monospaced;color:black"
lang="EN-US">pks,locs</span><span
style="font-size:11.5pt;font-family:Monospaced;color:#4A55DB"
lang="EN-US">]</span><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"> <span style="color:#5C5C5C">=</span> <u><span
style="color:#AE5CB0">findpeaks</span></u><span
style="color:#4A55DB">(</span><span style="color:black">data</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><u><span
style="font-size:11.5pt;font-family:Monospaced;color:#AE5CB0"
lang="EN-US">plot</span></u><span
style="font-size:11.5pt;font-family:Monospaced;color:#4A55DB"
lang="EN-US">(</span><span
style="font-size:11.5pt;font-family:Monospaced;color:black"
lang="EN-US">locs,</span><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"> <span style="color:black">pks,</span> <span
style="color:rosybrown">'xr'</span><span
style="color:#4A55DB">)</span><span style="color:black">;<o:p></o:p></span></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced;color:black"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced;color:black"
lang="EN-US">Note: using oct2py and pims might also be an
option for simple cases but these wrappers are complex to
use and data need to be copied at language boundaries.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced;color:black"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.5pt;font-family:Monospaced"
lang="EN-US">Clément</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
lang="EN-US"> users <<a
href="mailto:users-bounces@lists.scilab.org"
moz-do-not-send="true">users-bounces@lists.scilab.org</a>>
<b>On Behalf Of </b>CHEZE David 227480<br>
<b>Sent:</b> Tuesday, March 16, 2021 2:53 PM<br>
<b>To:</b> Users mailing list for Scilab <<a
href="mailto:users@lists.scilab.org"
moz-do-not-send="true">users@lists.scilab.org</a>><br>
<b>Subject:</b> [Scilab-users] find and locate local
maxima<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">I’m looking for
function that could find and locate every local maxima of
any discrete time signal (timeseries), similar to Matlab
or Octave function findpeaks(), scipy find_peaks(). Is
anyone aware if something similar is already available in
Scilab ? (I already browsed a little bit and it don’t seem
so…)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">If not in Scilab
macros, any hint to use the Octave or scipy function
directly from Scilab? <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">More globally it seems
that Octave Forge could be linked with Python (from oct2py
import octave<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"># Load the
Octage-Forge signal package.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">octave.eval("pkg load
signal")), does someone ever tried to bridge similarly in
Scilab ? oct2sci<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif"
lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif">David
</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
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<pre class="moz-signature" cols="72">--
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
<a class="moz-txt-link-freetext" href="http://www.utc.fr/~mottelet" moz-do-not-send="true">http://www.utc.fr/~mottelet</a>
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