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Hi <br>
<br>
I would like to read in EDF+ data with FieldTrip, including triggers
that are coded in the annotation channel. FieldTrip has recently
been updated to be able to read EDF+ data (Thanks Robert!). Before,
FieldTrip could only read EDF data (so then it could not read events
which are coded on the annotation channel). However, in the EDF+
data that I have (which is generate by Net Station software, EGI
company), the events on the annotation channel are not read in
correctly. I asked EGI support for the definition they use to write
the events to the annotation channel in the EDF+ format as is
produced by Net Station, and I got this answer from one of their
technicians:<br>
<br>
<div id="kerio-curpos"><span class="Apple-style-span"
style="font-family: 'Arial Black'; font-size: 12px;">- Each
annotation channel contains a time keeping TAL for each
EDF+ block, which is +blockTime[20][20][0] </span></div>
<div id="kerio-curpos"><font class="Apple-style-span" size="3"><span
class="Apple-style-span" style="font-size: 12px;"><font
class="Apple-style-span" face="'Arial Black'"><br style="">
Then, it contains each event for the block, in this format. <br
style="">
+startTime[21]duration[20]name[20][0] <br style="">
<br style="">
All times are in seconds. The values in [ ] are the numbers
that are written into the binary file, and are described in
the EDF+ specification. <br>
<br>
</font></span></font>My knowledge on reading in data and the
EDF+ format is not sufficient to understand this. I would like to
update read_edf (in private of fileio) to also be able to read in
the EGI version of EDF+ data. Does anyone know how to do this? Any
help would be greatly appreciated.<br>
<br>
And while I'm at it, are there any other EGI users on the list
that are or will be using the new MFF data format? I would like to
use this new data format in FieldTrip, but so far FieldTrip can't
read it in yet. Did anyone already write some code to read this
format in that we could include into FieldTrip? Also, I've just
created a "<a href="cid:part1.04070304.09070603@berkeley.edu"
moz-do-not-send="false">getting started with EGI data</a>" page
on the FieldTrip wiki. I'll document my experiences there.
Everyone else with relevant info is (as allways) invited to help
fill it.<br>
<br>
Thanks a lot,<br>
<br>
All the best,<br>
Ingrid<br>
</div>
<pre class="moz-signature" cols="72">--
Ingrid Nieuwenhuis PhD
Sleep and Neuroimaging Laboratory
Department of Psychology
University of California, Berkeley
California 94720-1650</pre>
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