[Eeglablist] advice on exporting to cartool
Hamish Innes-Brown
hinnesbrown at gmail.com
Wed Sep 3 00:36:39 PDT 2008
Hi there, I'm writing to the list to see if anyone has any advice on
how best to export data from EEGLAB to Cartool...
http://brainmapping.unige.ch/Cartool.htm
I have the data in a variety of forms in EEGLAB - continuous, epoched
and averaged. The best thing (I think) would be to export the
continuous data in a format that Cartool can read, preferably a format
that contains all the event onformation as well, like neuroscan .EEG
(this is just one I know) or EDF.
I looked into it a bit, and discovered the Biosig toolbox distributed
with EEGlab can read and write EDF, using the "ssave()" command.
> help ssave
> SSAVE saves signal data in various data formats
>
> Currently are the following data formats supported:
> EDF, BDF, GDF, BKR, SND/AU, (WAV, AIF)
> and WSCORE event file
>
> HDR = ssave(HDR,data);
> HDR = ssave(FILENAME,data,TYPE,Fs);
>
> FILENAME name of file
> data signal data, each column is a channel
> TYPE determines dataformat
> Fs sampling rate
>
> see also: ssave, sopen, swrite, sclose, doc/README
Horay! But am I right in thinking this command will simply accept a
matrix with rows=samples... And no provision for events or epochs?
So I would have to firstly elect data by each stimulus type, and then
export a version of [EEG.data] where all the epochs in the 3rd
dimension were concatenated together, and then hope that there is some
way to re-segment in cartool...
Then I searched my archives of eeglablist emails for a dim memory -
the writecnt function. This looks like it might do the trick, except
that my data are already epoched, and there is no equivalent
"writeeeg" to write a neuroscan epoched *.eeg file...
Any tips - has anyone opened ICA-filtered epochs from EEGLAB in
Cartool before?
Thanks!
-hamish0
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