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<p class="MsoNormal"><span lang="EN-US">Dear All<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 spent some time in looking for a mistake in my code ; finally I’ve found that the ACOS of a real vector leads to some complex values (???)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<pre><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:#32B9B9">acos</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB">(</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:black">Scar_P</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB">(</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:#FFAA00">:</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:black">,</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:rosybrown">1</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB">)</span><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif""> <span style="color:#5C5C5C">./</span> <span style="color:black">CM_x_CN</span><span style="color:#4A55DB">(</span><span style="color:#FFAA00">:</span><span style="color:black">,</span><span style="color:rosybrown">1</span><span style="color:#4A55DB">))<o:p></o:p></span></span></pre>
<pre><span lang="ES" style="font-size:12.0pt;font-family:"Monospaced","serif""><o:p> </o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US">(the formula worked so far)<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"><span lang="EN-US">I checked that the input values are correct:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Comprised between [-1; 1] using MIN and MAX<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US">Composed only of real values using ISREAL (all the vectors are correct)<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">Thus I do not understand why complex values appear ?<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">May it come from the vectorization ?<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"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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