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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear fieldtrip experts,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I was wondering how to get the mean phase difference between two sources A and B at a particular frequency f (mean across data segments). My idea was to use dics and to say cfg.refdip=A and cfg.keepcsd=’yes’. Then I would get C, the cross spectral density between A and B, which is a 3x3 matrix with complex entries. Joachim Gross wrote that one could estimate csd in the dominant direction as the trace of C. So I guess I could get the phase difference by angle(trace(C)). Is this correct? If I wanted to use SVD to estimate the dominant direction instead of the trace, how would I get the phase difference then? And finally, if I wanted to have coherence not with the dipole orientation that maximizes power but with the orientation that maximizes phase difference, how would that work?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks for any remarks!<o:p></o:p></p><p class=MsoNormal>Jan<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>--<o:p></o:p></p><p class=MsoNormal>Jan Hirschmann<o:p></o:p></p><p class=MsoNormal>MSc Neuroscience<o:p></o:p></p><p class=MsoNormal>Institute of Clinical Neuroscience and Medical Psychology<o:p></o:p></p><p class=MsoNormal><span lang=DE>Heinrich Heine University Düsseldorf<o:p></o:p></span></p><p class=MsoNormal><span lang=DE>Universitätsstr. 1<o:p></o:p></span></p><p class=MsoNormal><span lang=DE>40225 Düsseldorf<o:p></o:p></span></p><p class=MsoNormal><span lang=DE>Germany<o:p></o:p></span></p><p class=MsoNormal><span lang=DE>Tel: +49 (0)211 81 18415<o:p></o:p></span></p><p class=MsoNormal><span lang=DE>Fax: +49 (0)211 81 19033<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>