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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Dear community,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><br>
I have been trying to run a connectivity analysis on beamformed source data using the script below with WPLI, but this only works when the method defined for the ft_connectivityanalysis is the coherency (cfg.method = ‘coh’). According to the fieldtrip website,
wpli or wpli_debiased exist as methods, but these work only on frequency data (here, the freq variable). The problem is if I run the connectivity analysis on the freq rather than on the source data, I won’t be able to beamform its results using ft_sourceanalysis,
since it requires freq data as well. Is it therefore possible to run a connectivity analysis with WPLI while having the data beamformed on a source model?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:70.8pt"><span style="mso-fareast-language:EN-US"><br>
<i>cfg = [];<o:p></o:p></i></span></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.sourcemodel = sourcemodel;<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.headmodel = headmodel;<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">lf = ft_prepare_leadfield(cfg, dataclean);<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg = [];<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.method = 'mtmfft';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.output = 'fourier';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.keeptrials = 'yes';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.tapsmofrq = 1;<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.foi = [0.5 4];<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">freq = ft_freqanalysis(cfg, dataclean);<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US"><br>
cfg = [];<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.frequency = freq.freq;<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.method = 'pcc';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.grid = lf;<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.headmodel = headmodel;<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.keeptrials = 'yes';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.pcc.lambda = '10%';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.pcc.projectnoise = 'yes';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.pcc.fixedori = 'yes';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">source = ft_sourceanalysis(cfg, freq);<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">source = ft_sourcedescriptives([], source);<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg = [];<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.method ='coh';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">cfg.complex = 'absimag';<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US">source_conn = ft_connectivityanalysis(cfg, source);<o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:70.8pt"><i><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><br>
Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Charly<br>
<br>
<o:p></o:p></span></p>
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