[Mne_analysis] order_func and oscillations phase

[Alexandre Gramfort]

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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