[Mne_analysis] which type of refence eletrode is used in MNE sample data (EEG)

[Eric Larson]

During Neuromag EEG acquisition usually there is a reference electrode
placed on the nose. You could check the digitization field in the
measurement information info['dig'] or look at any EEG channel
info['chs'][eeg_idx]['loc'], IIRC the first three numbers are the digitized
electrode location XYZ and the next three are the digitized reference
location XYZ in head coordinates.

HTH,
Eric
On Jul 9, 2016 1:19 PM, "Alexandre Gramfort" <
alexandre.gramfort at telecom-paristech.fr> wrote:

> sorry no idea
>
> A
>
> On Sat, Jul 9, 2016 at 1:29 PM, brainz at sina.com <brainz at sina.com> wrote:
> > Thanks, Alex,
> >
> > I have learned the tutorials.
> > But do you know what is the original reference of the EEG sample data?
> > I noticed that
> > the scalp map using average reference is different from that using
> original
> > one.
> >
> > Best wishes,
> > Junpeng
> >
> >
> >
> >
> > From: Alexandre Gramfort
> > Date: 2016-07-09 18:28
> > To: Discussion and support forum for the users of MNE Software
> > CC: Huang yunzhiGardenia Elaine
> > Subject: Re: [Mne_analysis] which type of refence eletrode is used in MNE
> > sample data (EEG)
> > hi,
> >
> > MNE uses by default average reference.
> >
> > have a look at this tutorial
> >
> > http://martinos.org/mne/dev/auto_tutorials/plot_eeg_erp.html
> >
> > HTH
> > Alex
> >
> >
> > On Sat, Jul 9, 2016 at 11:53 AM, junpeng.zhang at gmail.com
> > <junpeng.zhang at gmail.com> wrote:
> >>
> >> Dear MNE users,
> >> I also had a question related to the EEG processing.
> >> Which reference eletrode is originally used in the EEG included in
> sample
> >> data?
> >>
> >> Thank you in advance.
> >>
> >> Junpeng
> >> “海纳百川 有容乃大”
> >> “Live as you are dying, and never stop trying”
> >>
> >>
> >>
> >>
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