[Mne_analysis] troubles with mne.io.read_raw_brainvision

[Eric Larson]

Excellent, thanks for investigating. Can you open a GitHub issue or PR and
we can iterate there?

On Wed, May 24, 2017 at 10:06 AM, Boris BURLE <boris.burle at univ-amu.fr>
wrote:

> Hello,
>
> Just an update on Stefania comments.
>
> Investigating the issue, it appears that mne.io.read_raw_brainvision is
> currently not using the information about data orientation in the header
> (.vhdr) file:
>
> DataOrientation=VECTORIZED
>
> Apparently, the function assumes that data are multiplexed. It's just a
> matter of transposing the matrix while reading. I'll try to pinpoint the
> lines in mne.io.read_raw_brainvision where this should be done.
>
>      Best,
>          B.
>
>
> On 24/05/2017 12:37, Alexandre Gramfort wrote:
> > hi Stefania,
> >
> > can you share the file?
> >
> > thanks
> > Alex
> >
> > On Wed, May 24, 2017 at 12:10 PM, Stefania Ficarella <sf.ang at libero.it>
> wrote:
> >> Hello,
> >> I am using mne.io.read_raw_brainvision to read bipolar EMG and EKG data
> >> saved as brainvision files (vhdr).
> >> I have 4 channels: EMGleft,EMGright,EKG and STI 014 with the triggers.
> >>
> >> However, when I import the data in MNE python, the first three channels
> are
> >> not correctly imported.
> >> They all look like a combination of EMG data, however they do not
> correspond
> >> to the original data, particularly even the third channel is not at all
> EKG.
> >> You can see attached to the email the images with a portion of imported
> data
> >> from the three channels.
> >>
> >> Is it possible that the function is using a reference by default? I
> don't
> >> see this option in the function.
> >> This is how I am using the function:
> >>
> >> emg = mne.io.read_raw_brainvision(emgFname,montage=None,
> >> misc='auto',scale=1.0,preload=True, verbose=True)
> >>
> >> I don't get any error. But the data are not correctly imported.
> >> Any ideas?
> >>
> >> Many thanks,
> >> Stefania
> >>
> >> Stefania Ficarella, Ph.D.
> >> Laboratoire de Neurosciences Cognitives (LNC)
> >> Centre National de la Recherche Scientifique (CNRS)
> >> Aix-Marseille Université
> >> Site Saint Charles
> >> 3, Place Victor Hugo
> >> 13331 Marseille (France)
> >>
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