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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><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>Sorry for this basic question but I failed in finding the answer after a look in the documentation …<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>… how can I optimize the following basic code (using vectorization instead of loops) ?<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>Thanks to the community<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 style='font-family:"Monospaced","serif";color:#32B9B9'>mode</span><span lang=EN-US style='font-family:"Monospaced","serif";color:#4A55DB'>(</span><span lang=EN-US style='font-family:"Monospaced","serif";color:rosybrown'>0</span><span lang=EN-US style='font-family:"Monospaced","serif";color:#4A55DB'>)</span><span lang=EN-US style='font-family:"Monospaced","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif";color:black'>A</span><span lang=EN-US style='font-family:"Monospaced","serif"'> <span style='color:#5C5C5C'>=</span> <span style='color:#4A55DB'>[</span><span style='color:rosybrown'>1</span> <span style='color:#FFAA00'>:</span> <span style='color:rosybrown'>0.2</span> <span style='color:#FFAA00'>:</span> <span style='color:rosybrown'>100</span><span style='color:#4A55DB'>]</span><span style='color:#5C5C5C'>'</span><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif";color:black'>B</span><span lang=EN-US style='font-family:"Monospaced","serif"'> <span style='color:#5C5C5C'>=</span> <span style='color:#4A55DB'>[</span><span style='color:rosybrown'>100</span> <span style='color:#FFAA00'>:</span> <span style='color:rosybrown'>1</span> <span style='color:#FFAA00'>:</span> <span style='color:rosybrown'>595</span><span style='color:#4A55DB'>]</span><span style='color:#5C5C5C'>'</span><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif";color:#4A55DB'>[</span><span lang=EN-US style='font-family:"Monospaced","serif";color:black'>nl,nc</span><span lang=EN-US style='font-family:"Monospaced","serif";color:#4A55DB'>]</span><span lang=EN-US style='font-family:"Monospaced","serif"'> <span style='color:#5C5C5C'>=</span> <span style='color:#32B9B9'>size</span><span style='color:#4A55DB'>(</span><span style='color:black'>A</span><span style='color:#4A55DB'>)</span><span style='color:black'>;</span><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif";color:black'>C</span><span lang=EN-US style='font-family:"Monospaced","serif"'> <span style='color:#5C5C5C'>=</span> <span style='color:#32B9B9'>zeros</span><span style='color:#4A55DB'>(</span><span style='color:black'>nl,</span><span style='color:rosybrown'>1</span><span style='color:#4A55DB'>)</span><span style='color:black'>;</span><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif";color:#A020F0'>for</span><span lang=EN-US style='font-family:"Monospaced","serif"'> <span style='color:black'>i</span> <span style='color:#5C5C5C'>=</span> <span style='color:rosybrown'>1</span> <span style='color:#FFAA00'>:</span> <span style='color:black'>nl</span><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif"'> <span style='color:black'>C</span><span style='color:#4A55DB'>(</span><span style='color:black'>i,</span><span style='color:rosybrown'>1</span><span style='color:#4A55DB'>)</span> <span style='color:#5C5C5C'>=</span> <span style='color:black'>A</span><span style='color:#4A55DB'>(</span><span style='color:black'>i,</span><span style='color:rosybrown'>1</span><span style='color:#4A55DB'>)</span><span style='color:#5C5C5C'>*</span><span style='color:black'>B</span><span style='color:#4A55DB'>(</span><span style='color:black'>i,</span><span style='color:rosybrown'>1</span><span style='color:#4A55DB'>)</span><span style='color:black'>;</span><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif";color:#A020F0'>end</span><span lang=EN-US style='font-family:"Monospaced","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Monospaced","serif"'><o:p> </o:p></span></p><p class=MsoNormal><i><span lang=EN-US style='font-family:"Monospaced","serif";color:#64AE64'>// D = prod(</span></i><span lang=EN-US style='font-family:"Monospaced","serif"'><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-family:"Monospaced","serif";color:#64AE64'>//A(nl,1)*B(nl,1) - C(nl,1)</span></i><span style='font-family:"Monospaced","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>