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<p class="MsoNormal">Hi Jan-Mathijs<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you for the suggestion. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Just so I can understand better: do you suggest to add a singleton to the datamatrix before permuting the dimensions?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would like to use the cluster-correction method in fieldtrip at single-subject level to test between condition differences in time-frequency.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Would it be correct to permute: ‘rpt_freq_time’ ? <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind regards<o:p></o:p></p>
<p class="MsoNormal">Knut <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> fieldtrip <fieldtrip-bounces@science.ru.nl> <b>
On Behalf Of </b>Schoffelen, J.M. (Jan Mathijs) via fieldtrip<br>
<b>Sent:</b> Wednesday, December 6, 2023 9:16 AM<br>
<b>To:</b> FieldTrip discussion list <fieldtrip@science.ru.nl><br>
<b>Cc:</b> Schoffelen, J.M. (Jan Mathijs) <janmathijs.schoffelen@donders.ru.nl><br>
<b>Subject:</b> Re: [FieldTrip] Question about dataformat when using cluster based permutation testing on time-frequency data<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi Knut-André, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I think that this can be solved if you do your best to be a bit more work into shaping your data structure into something that Fieldtrip likes:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">G.dimord = ‘rpt_chan_freq_time’;<o:p></o:p></p>
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<p class="MsoNormal">G.powspctrm = permute(shiftdim(tf_datamatrix,-1),[4 1 2 3]);<o:p></o:p></p>
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<p class="MsoNormal">G.freq = frex;<o:p></o:p></p>
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<p class="MsoNormal">G.time = <the time-axis, consisting of a vector with the number of points along the fourth dimension of the powspctrm matrix>;<o:p></o:p></p>
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<p class="MsoNormal">G.label = {‘harry_hole’};<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best wishes,<o:p></o:p></p>
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<p class="MsoNormal">Jan-Mathijs<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On 4 Dec 2023, at 10:21, Knut-André Skaug via fieldtrip <<a href="mailto:fieldtrip@science.ru.nl">fieldtrip@science.ru.nl</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello,<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thank you for providing this toolbox.<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">My question pertains to the data format in order to run permutation testing on time-frequency data in source space.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Because I have already extracted the time-frequency data matrix I wish to continue with the function ft_freqanalysis to run cluster-corrected permutation testing.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">The time-frequency data matrix have dimensions: Frequency x Time x Trials.<o:p></o:p></p>
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<p class="MsoNormal">Thus, there are no channels in this matrix.<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">I’ve tried to set the data structure to be:<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">G.dimord = ‘freq_time_rpt’;<o:p></o:p></p>
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<p class="MsoNormal">G.powspctrm = tf_datamatrix;<o:p></o:p></p>
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<p class="MsoNormal">G.freq = frex;<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">But this returns an error message when following the tutorial on cluster-based permutation testing – between trials – both on event-related fields and time-frequency data.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">How can I carry out cluster-based permutation testing on my two time-frequency matrices, Condition A and Condition B?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Kind regards<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal">Knut<span class="apple-converted-space"> </span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif">_______________________________________________<br>
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<p class="MsoNormal"><o:p> </o:p></p>
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