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Dear Mahdi,<br>
<br>
In FieldTrip, you can either reject a trial or a channel completely
for your whole dataset. If you want to reject individual channels
for single trials, you have to do it manually. I would not recommend
it, though, because it will lead to inconsistencies and thus errors
throughout the rest of your analyses, e.g. for freqanalysis it is
necessary to have the same amount of channels for all trials. You
can hack your way through this by replacing the corresponding
channel with NaNs or zeros, but that will also lead to problems and
may make your results invalid (depending on what you want to do). My
advise would be to dismiss the whole trial or use ICA to remove
certain components (a tutorial can be found on the FieldTrip
website)<br>
<br>
Best,<br>
Jörn<br>
<br>
On 3/2/2011 7:35 PM, m m wrote:
<blockquote cite="mid:627585.36123.qm@web45806.mail.sp1.yahoo.com"
type="cite">
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<div>Hi FT users,<br>
<br>
I have a question about artifact rejection. Is there any
method to reject one channel in one trial and not whole
channel of that trial?<br>
<br>
Thanks<br>
Mahdi<br>
</div>
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<br>
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<br>
<pre class="moz-signature" cols="72">--
Jörn M. Horschig
PhD Student
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen
P.O. Box 9101
NL-6500 HB Nijmegen
The Netherlands
Contact:
E-Mail: <a class="moz-txt-link-abbreviated" href="mailto:jm.horschig@donders.ru.nl">jm.horschig@donders.ru.nl</a>
Tel: +31-(0)24-36-68493
Web: <a class="moz-txt-link-freetext" href="http://www.ru.nl/fcdonders">http://www.ru.nl/fcdonders</a>
Visiting address:
Trigon, room 2.30
Kapitelweg 29
NL-6525 EN Nijmegen
The Netherlands</pre>
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