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Yes, and be sure that cfg.channelcmb is an Nx2 cell-array: {‘somechannel’ ‘someotherchannel’; ‘againsomechannel’ ‘someotherchannelaswell’; ‘etc’ ‘etc’}
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<div class="">Best wishes,</div>
<div class="">Jan-Mathijs</div>
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<div class="">On 30 Mar 2018, at 18:00, Tobias Staudigl <<a href="mailto:tobias.stdgl@gmail.com" class="">tobias.stdgl@gmail.com</a>> wrote:</div>
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<div class="">Hi Taylor,
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<div dir="auto" class="">First specify</div>
<div dir="auto" class="">cfg.output = 'fourier'</div>
<div dir="auto" class="">Or</div>
<div dir="auto" class="">cfg.output ='powandcsd'</div>
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<div dir="auto" class="">in your ft_freqanalysis.</div>
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<div dir="auto" class="">Then try ft_connectivityanalysis again. </div>
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<div dir="auto" class="">Best, </div>
<div dir="auto" class="">Tobias </div>
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<div class="gmail_quote">Am 30.03.2018 17:53 schrieb "Rosa Taylor Beale" <<a href="mailto:TaylorBealeR@cardiff.ac.uk" class="">TaylorBealeR@cardiff.ac.uk</a>>:<br type="attribution" class="">
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<p class="MsoNormal" style="text-align:justify">Hi all,<u class=""></u><u class=""></u></p>
<p class="MsoNormal" style="text-align:justify">I’m a final year undergraduate in Cardiff working on pain networks.
<u class=""></u><u class=""></u></p>
<p class="MsoNormal">I have been trying to calculate coherence between 3 seed regions, however when I run the ft_connectivityanalysis, the labelcmb and cohspctrm arrays are empty (the channel labels don’t look like they were read?). There is no error or warning
messages that occur when running the command, so I am unsure why it is not running correctly.
<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">First, I run ft_freqanalysis which seems to run fine:<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg = []<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg.method = 'wavelet';<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg.output = 'pow';<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg.toi = 0:0.05:2;<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg.foi = [30:1:100];<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">time_freq= ft_freqanalysis(cfg, virtualchannel_raw);<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"><span class="">time_freq = <br class="">
<br class="">
label: {3x1 cell}<br class="">
dimord: 'chan_freq_time'<br class="">
freq: [1x71 double]<br class="">
time: [1x41 double]<br class="">
powspctrm: [3x71x41 double]<br class="">
cfg: [1x1 struct]<u class=""></u><u class=""></u></span></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">Then I run the connectivity analysis and up with the empty output:<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg = [];<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg.method = 'coh';<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">cfg.channelcmb = {'pfcCont_seed' 'smc_seed'<u class=""></u><u class=""></u></p>
<p class="MsoNormal"> 'pfcIps_seed' 'smc_seed'<u class=""></u><u class=""></u></p>
<p class="MsoNormal"> 'pfcCont_seed' 'pfcIps_seed'}; <u class="">
</u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">coherence = ft_connectivityanalysis(cfg, time_freq);<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">coherence = <u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">labelcmb: {0x2 cell}<u class=""></u><u class=""></u></p>
<p class="MsoNormal">dimord: 'chancmb_freq_time'<u class=""></u><u class=""></u></p>
<p class="MsoNormal">cohspctrm: [0x71x41 double]<u class=""></u><u class=""></u></p>
<p class="MsoNormal">time: [1x41 double]<u class=""></u><u class=""></u></p>
<p class="MsoNormal">freq: [1x71 double]<u class=""></u><u class=""></u></p>
<p class="MsoNormal">cfg: [1x1 struct]<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">>> coherence.labelcmb<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">ans = <u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"> Empty cell array: 0-by-2<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">>> coherence.cohspctrm<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">ans =<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"> Empty array: 0-by-71-by-41<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">I have tried with fieldtrip versions 20161011 and 20171015 on matlab r2015a.<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal">I’ve shown this to various people much more experienced at fieldtrip than I and we’ve all been a bit stumped!<u class=""></u><u class=""></u></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Any ideas?<u class=""></u><u class=""></u></p>
<p class="MsoNormal">Many thanks<u class=""></u><u class=""></u></p>
<p class="MsoNormal">Rosa Taylor Beale<u class=""></u><u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<p class="MsoNormal"><u class=""></u> <u class=""></u></p>
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