Problems reading BVA data (segmented)
Markus Werkle-Bergner
werkle at MPIB-BERLIN.MPG.DE
Thu Dec 15 18:28:10 CET 2005
Dear all,
I'm a beginner with fieldtrip, therefore I probably have an easy question.
I try to read in EEG-data that I already preprocessed in Brainvision
Analyser. The data is therefore already segmented. From the tutorials
and the discussion list, I understood that I should nevertheless use the
function preprocessing.m. Now my guess is that I have trouble with the
definition of trials from my data-set. I used the following script to
read the data:
cfg = []
% General settings
cfg.datafile =
'E:\MATLAB\DATA\Oddball_TestFieldtrip\Export\mdo13136_1_HFCrej.dat';
cfg.headerfile =
'E:\MATLAB\DATA\Oddball_TestFieldtrip\Export\mdo13136_1_HFCrej.vhdr';
cfg.channel = 'all';
%Trialdefinition
cfg.trialfun = 'trialfun_brainvision';
cfg.trialdef.trgfile =
'E:\MATLAB\DATA\Oddball_TestFieldtrip\Export\mdo13136_1_HFCrej.vmkr';
cfg.trialdef.stim = 'HFC';
cfg.trialdef.segment = 'no';
cfg.trialdef.timezero = 'no';
cfg.trialdef.eventtype = 'Stimulus';
cfg.trialdef.eventvalue = 'HFC';
cfg.trialdef.prestim = 0.500;
cfg.trialdef.poststim = 0.600;
[cfg]=definetrial(cfg)
[raw] = preprocessing(cfg)
When I run this script, I get the following error-message:
??? Error using ==> fieldtrip-20051214\private\read_brainvision_vmrk
cannot open marker file
Error in ==> fieldtrip-20051214\private\trialfun_brainvision at 16
[stim, resp, segment, timezero] =
read_brainvision_vmrk(cfg.trialdef.trgfile);
Error in ==> definetrial at 151
trl = feval(cfg.trialfun, cfg);
Error in ==> FieldtripTest at 17
[cfg]=definetrial(cfg)
I checked that the *.dat, *.vhdr, and *.vmrk files are all in the
location specified in the script. I really would appreciate if one can
give me some advice.
Best regards,
Markus
P.S.: I added the *.vhdr, and *.vmrk files. Perhaps this information is
needed.
--
**************************************************************
Markus Werkle-Bergner, Dipl. Psych.
Predoctoral Research Fellow
Center for Lifespan Psychology
Max Planck Institute for Human Development
Lentzeallee 94, Room 211, D-14195 Berlin, Germany.
Phone: +49(0)30-82406-447 Fax: +49(0)30-8249939
**************************************************************
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