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").
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
> 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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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.
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
> 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
>>
>>
>> > 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.
>> >
>> > _______________________________________________
>> > Mne_analysis mailing list
>> > Mne_analysis at nmr.mgh.harvard.edu
>> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
>> >
>> >
>> > The information in this e-mail is intended only for the person to whom
>> > it is
>> > addressed. If you believe this e-mail was sent to you in error and the
>> > e-mail
>> > contains patient information, please contact the Partners Compliance
>> > HelpLine at
>> > http://www.partners.org/complianceline . If the e-mail was sent to
you
>> > in
>> > error
>> > but does not contain patient information, please contact the sender
and
>> > properly
>> > dispose of the e-mail.
>> >
>> _______________________________________________
>> Mne_analysis mailing list
>> Mne_analysis at nmr.mgh.harvard.edu
>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
>
>
>
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>
> The information in this e-mail is intended only for the person to whom
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