[Eeglablist] Exporting continuous EEG data from BESA to EEGLAB

[Chang Gu]

Hi all,

I'm trying to transfer data between EEGlab and BESA for eye blink correction
and artifact rejection. But when we exported the EEG data from Besa in
simple binary format (.dat file) and read it by EEGlab using 'Import data:
FromASCII/float file or Matlab array', the potential value of the data was
rounded and we lost the decimal parts (e.g 80. 232 changed to 80). I also
tried to have BESA export data in ascii format, but still only have integer
part. I suspect that BESA rounds the Continuous data automatically to the
integer (since I use Matlab *fread() *read the .dat, but only see the
integers.)

Another option is to export the data as .edf file and use biosig plugin in
EEGLAB to read it.
The .edf from BESA preserves the decimal part, but the value changed somehow
in EEGLAB... I'm not sure if the plugin works correctly or not... (Someone
looks into this function and compared the results?)

Does anyone know how to export (continuous) data from BESA to EEGLAB without
losing resolution?

Thanks!

Chang

-- 
Chang Gu
Psychology & Human Development
Vanderbilt University
Nashville, TN
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