[Mne_analysis] order_func and oscillations phase

[Laetitia Grabot]

Ok thanks, that what I wanted to know!
Laetitia

2014-11-06 10:57 GMT+01:00 Alexandre Gramfort <
alexandre.gramfort at telecom-paristech.fr>:

> hi,
>
> the order is based on correlation ie neighboring trials are highly
> correlated.
> Now the global order is arbitrary ie the trials could be presented in
> reverse
> order.
>
> does it answer the question?
>
> Alex
>
>
> On Thu, Nov 6, 2014 at 10:15 AM, Laetitia Grabot
> <laetitia.grabot at gmail.com> wrote:
> > Sure, here is my image:
> > http://snag.gy/lPmcS.jpg
> >
> > Thanks in advance,
> > Laetitia
> >
> > 2014-11-06 9:57 GMT+01:00 Alexandre Gramfort
> > <alexandre.gramfort at telecom-paristech.fr>:
> >>
> >> hi Laetitia,
> >>
> >> can you share the images using dropbox, google drive
> >> or an image sharing service as http://snag.gy/ ?
> >>
> >> the ordering is based on correlations by default.
> >>
> >> thx
> >> Alex
> >>
> >>
> >> On Wed, Nov 5, 2014 at 5:01 PM, Laetitia Grabot
> >> <laetitia.grabot at gmail.com> wrote:
> >> > Dear list,
> >> >
> >> > I have a question about the order_func used to reorder trials for
> >> > visualisation. I'm looking at filtered trials, so after reordering I
> get
> >> > a
> >> > pattern of blue (troughs of oscillations) and yellow (peaks) bands.
> >> > Sometimes the first ordered trials corresponds to a trough (as in the
> >> > following example, where I order trials on [-100;+100]ms). Does it
> mean
> >> > that
> >> > in my epochs, there is at that time a majority of trials at the
> trough ?
> >> > Or
> >> > does it mean that the trials with largest amplitude corresponds to
> >> > troughs
> >> > of oscillations ?
> >> > Actually, I don't understand very well with which parameters the
> >> > ordering
> >> > function is ordering trials (even if I read on the related paper that
> >> > the
> >> > ordering is done on the basis of "trials variability").
> >> >
> >> > Thanks a lot,
> >> > Laetitia G.
> >> >
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