[Mne_analysis] No Events from mne_brain_vision2fiff

[Matti Hamalainen]

Hi Christian,

Investigation of the code revealed that mne_brain_vision2fiff handles only events which are marked "Stimulus" and whose number is given by S<number>. In your file, the events are obviously user responses. The easy solution is to replace in R0026_eref3h.vmrk the word "Response" with "Stimulus" and "R128" with "S128". You can also simply change "Response,R" to "Stimulus,S". 

I hope this helps.

- Matti

On Jul 29, 2012, at 6:45 AM, Christian Brodbeck wrote:

> Hello,
> 
> We are trying to convert brain vision EEG files using mne_brain_vision2fiff, but the resulting fiff files do not contain any events. This is the command I run:
> 
> 
>    $ mne_brain_vision2fiff --header R0026_eref3h.vhdr --out R0026_eref3h.fif
> 
>    mne_brain_vision2fiff version 1.7 compiled at Jan  7 2011 02:26:21
> 
>    header  file           : R0026_eref3h.vhdr
>    output file            : R0026_eref3h.fif
> 
>    Read header file : R0026_eref3h.vhdr
>    Read header file : R0026_eref3h.vmrk
> 
>    nchan           = 4
>    sfreq           = 500.0  Hz
>    raw data file   = R0026_eref3h.eeg
>    raw binary      = true
>    raw binary type = 16
>    raw endian      = little
>    raw nsamp       = -1
>    nevent          = 0
>    eXimia          = false
> 
>    Data will be split into <= 1907.3 MByte pieces
> 
>    Writing header to R0026_eref3h_raw.fif ... [done]
>    Writing raw data to R0026_eref3h_raw.fif ... Number of samples deduced from the raw file size : 628790
>    [done]
>    Wrote 1...628790 of 628790 samples total to R0026_eref3h_raw.fif
>    Adding directory to R0026_eref3h_raw.fif...[done]
> 
> 
> Eeglab finds the events so I assume the brain vision files are ok. Is this a known problem, or does anyone have an idea how to fix this? The files are small so if it helps I could upload them.
> 
> Thanks
> 
> -Christian
> 
> 
> 
> 
> _______________________________________________
> Mne_analysis mailing list
> Mne_analysis at nmr.mgh.harvard.edu
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
> 
> 



---------

Matti Hamalainen, Ph.D.
Athinoula A. Martinos Center for Biomedical Imaging
Massachusetts General Hospital

msh at nmr.mgh.harvard.edu
mhamalainen at partners.org






-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20120729/dab62097/attachment.html