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<p class="MsoNormal"><span style="color:#1F497D">Reposting !</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi EEGLABers,<o:p></o:p></p>
<p class="MsoNormal">I have found few papers and discussions about doing PCA and then ICA for increasing the K-factor and dimensionality reduction. The (un)mixing matrix would be m x m which m is the number of PCA. Each row (column) is the weights for ICA sources.<o:p></o:p></p>
<p class="MsoNormal">However, I cannot completely understand what is the meaning of the ICA outputs? How are the IC maps (topo maps) constructed since we need the location of PCA components (similar to the channels locations) to plot the spatial filters/IC
maps. <o:p></o:p></p>
<p class="MsoNormal">In other words, how can we plot the IC maps given the fact that we don’t have the spatial information about PCA components?<o:p></o:p></p>
<p class="MsoNormal">Best<o:p></o:p></p>
<p class="MsoNormal">Iman <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">============================================<o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial Rounded MT Bold",sans-serif;color:#7030A0">Iman M.Rezazadeh, Ph.D<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">UCLA David Geffen School of Medicine</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Semel Institute for Neuroscience and Human Behavior</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">760 Westwood Plaza, Ste 47-448</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Los Angeles, CA 90095<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><a href="http://www.linkedin.com/pub/iman-m-rezazadeh/10/859/840/">http://www.linkedin.com/pub/iman-m-rezazadeh/10/859/840/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
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