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<p class="MsoNormal">Dear all<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I’m currently thinking in a way to compare experimental have a bell shape, composed of points and not connected to any parametric curve (the bell shape assumption could answer to the need in a first step).<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">A way I can imagine is to calculate a kind of “ bandwidth” (-3 db).<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">I add a look in the Scilab help but nothing obvious appears<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">what is the best way to proceed to:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- calculate/determine the intersection points with the “pseudo”-curves,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- the number of points may change and may have different abscissa ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- the points could not necessarily by expressed by a parametric curve (to fit on before calculating the intersection),<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">Any suggestion are welcome<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"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><u><span lang="EN-US">NB</span></u></i><span lang="EN-US">: please find hereafter a basic example using a gauss curve (just to illustrate the purpose)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Thanks<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">Paul<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" style="font-size:12.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">######################################################################<o:p></o:p></span></p>
<pre><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#32B9B9">mode</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">(</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:rosybrown">0</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">)</span><span style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p> </o:p></span></pre>
<pre><i><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#64AE64">// gauss curve</span></i><span style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">coef</span><span style="font-size:11.0pt;font-family:"Monospaced","serif""> <span style="color:#5C5C5C">=</span> <span style="color:rosybrown">10</span><span style="color:black">;</span><o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">x</span><span style="font-size:11.0pt;font-family:"Monospaced","serif""> <span style="color:#5C5C5C">=</span> <span style="color:#4A55DB">[</span><span style="color:#5C5C5C">-</span><span style="color:rosybrown">6</span> <span style="color:#FFAA00">:</span> <span style="color:rosybrown">0.1</span> <span style="color:#FFAA00">:</span> <span style="color:rosybrown">6</span><span style="color:#4A55DB">]</span><span style="color:#5C5C5C">'</span><span style="color:black">;</span><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">[</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">nl,nc</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">]</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#5C5C5C">=</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#32B9B9">size</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">(</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">x</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">)</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">;</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">y1</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""> <span style="color:#5C5C5C">=</span> <span style="color:black">coef</span><span style="color:#5C5C5C">*</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">1</span><span style="color:#5C5C5C">/</span><span style="color:#32B9B9">sqrt</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">2</span><span style="color:#5C5C5C">*</span><span style="color:orchid">%pi</span><span style="color:#4A55DB">))</span><span style="color:#5C5C5C">*</span><span style="color:#32B9B9">exp</span><span style="color:#4A55DB">(</span><span style="color:#5C5C5C">-</span><span style="color:rosybrown">0.5</span><span style="color:#5C5C5C">*</span><span style="color:black">x</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></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p> </o:p></span></pre>
<pre><i><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#64AE64">// -3db line</span></i><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">top_</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""> <span style="color:#5C5C5C">=</span> <span style="color:#32B9B9">max</span><span style="color:#4A55DB">(</span><span style="color:black">y1</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">three_db</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""> <span style="color:#5C5C5C">=</span> <span style="color:black">top_</span><span style="color:#5C5C5C">/</span><span style="color:#32B9B9">sqrt</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">2</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">y2</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#5C5C5C">=</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">three_db</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#5C5C5C">*</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#32B9B9">ones</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">(</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">nl,</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:rosybrown">1</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">)</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">;</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Monospaced","serif""><o:p> </o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#32B9B9">plot2d</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">(</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">x,y1</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">)</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">;</span><span style="font-size:11.0pt;font-family:"Monospaced","serif""> <i><span style="color:#64AE64">// gausse curve</span></i><o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#32B9B9">plot2d</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">(</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">x,y2</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:#4A55DB">)</span><span style="font-size:11.0pt;font-family:"Monospaced","serif";color:black">;</span><span style="font-size:11.0pt;font-family:"Monospaced","serif""> <i><span style="color:#64AE64">// -3db line</span></i><o:p></o:p></span></pre>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p><b><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray">EXPORT CONTROL :
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<p class="MsoNormal"><o:p> </o:p></p>
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