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Dear Eric,<br>
<br>
Could we try to trick the program by deleting the powspctrm element and
renaming the cohspctrm to powspctrm (off course this would only work if
coherence between one channel and all the others was computed, so that
the matrix dimensions for both fields are the same). We can get it to
run technically, but the question is, would it yield reasonable output?<br>
<br>
Thanks,<br>
Marcel<br>
<br>
Eric Maris wrote:
<blockquote cite="mid001e01c6c6b4$03fd9080$43ccae83@fcdonders.nl"
type="cite">
<pre wrap="">Hi Lilla,
</pre>
<blockquote type="cite">
<pre wrap="">I would like to evaluate my coherence results with the cluster
</pre>
</blockquote>
<pre wrap=""><!---->randomization
</pre>
<blockquote type="cite">
<pre wrap="">statistics in Fieldtrip. My data files consisting of powerspctrm and
cohspctrm fields, as well (the time-frequency analysis of coherence was
calculated with fieldtrip). Therefore, it is not clear for me where or how
can I specify for the clusterrandanalysis function that I am interested in
the statistics of the coherence spectra and not the power spectra. Or do I
have to delete the powspctrm field to make it sure that the
clusterrandanalysis function would work on the coherence?
And in general, is this the right way of the statistical analysis of my
coherence data (which is infact, went through a planar transformation) or
should I use another statistics?
</pre>
</blockquote>
<pre wrap=""><!---->
Statistical testing of coherence differences using cluster-based
non-parametric tests are not yet implemented in Fieldtrip. This is one of
functionalities that will be added in the near future (i.e., when I have
graded the 400 retake-exams of my undergraduate methodology course (-;).
Greetings,
Eric Maris
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">dr. Marcel C.M. Bastiaansen.
FC Donders Centre for Cognitive Neuroimaging
Visiting address: Adelbertusplein 1, 6525 EK Nijmegen, the Netherlands
Mailing address: Trigon 181, PO Box 9101, 6500 HB Nijmegen, the Netherlands
phone: + 31 24 3610 882
fax: + 31 24 3610 989
email: <a class="moz-txt-link-abbreviated" href="mailto:marcel.bastiaansen@fcdonders.kun.nl">marcel.bastiaansen@fcdonders.kun.nl</a>
web: <a class="moz-txt-link-freetext" href="http://www.kun.nl/fcdonders/website/index.php">http://www.kun.nl/fcdonders/website/index.php</a>
--
</pre>
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