4D data reading -> 148 channel system

[jan-mathijs schoffelen]

Dear Julian,

As of the debugging thingy: sorry about that, I thought I adjusted it
but apparently something went wrong. You can easily fix this yourself
by going to the appropriate function. It's read_4d_hdr and you just
have to remove the keyboard-statement somewhere in the code. I don't
know where the function is located in the release version of
fieldtrip, but it should be somewhere like fieldtrip/private, or
fieldtrip/fileio/private. I hope that as of tomorrow the trailing
keyboard statement is removed from the release version.
Regarding your second point: I tried it out with a 148-channel
dataset I have lying around, and you're absolutely right.
Interestingly, for the 248-system it works just fine. Give me some
time to look into this. I hope to get it working robustly for both
systems. Could you for the time being check whether the field
data.hdr.orig.Channel looks meaningful for your data? A solution for
now would be to replace data.hdr.label (and data.label) with
hdr.orig.Channel.


Yours,

Jan-Mathijs



On Oct 8, 2008, at 4:22 PM, Julian Keil wrote:

> Hello everyone,
>
> i just tried to read 4D raw data as was suggested in the recent
> discussion.
> Unfortunately, I encountered 2 Problems:
>
> First, Matlab still enters the debug-mode, although I'm using the
> latest version of Fieldtrip
> Second, though I can read the raw datal, the labels for the MEG
> channels are missing. The data.hdr.label contains the 165 recorded
> channels but the labels are not the Names but - as I think - the
> locations.
> (e.g. A3+03).
> Could it be, that the definition for the 148-channel 4d-system is
> missing?
> Does anyone have a hint hw to solve this?
>
> Thanks a lot
>
> Julian Keil
>
>
> Dipl. Psych. Julian Keil
>
> OBOB-Lab
> University of Konstanz
> Department of Psychology
> P.O. Box D23
> 78457 Konstanz
> Germany
>
> Tel: ++49 - (0)7531 - 88 45 84
> Email: julian.keil at uni-konstanz.de
> Homepage: http://www.uni-konstanz.de/obob
>
>
>
>
> ----------------------------------
>
> The aim of this list is to facilitate the discussion between users
> of the FieldTrip toolbox, to share experiences and to discuss new
> ideas for MEG and EEG analysis.
>
> http://listserv.surfnet.nl/archives/fieldtrip.html
>
> http://www.ru.nl/fcdonders/fieldtrip/
>


----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/fcdonders/fieldtrip.
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