[FieldTrip] rereferencing after preproc

[Epstein, Michael]

Oh I see - I didn't realize you could use that function on data you had
already preprocessed once. 

Thank you, that's useful.

-Michael

-----Original Message-----
From: fieldtrip-bounces at donders.ru.nl
[mailto:fieldtrip-bounces at donders.ru.nl] On Behalf Of Eelke Spaak
Sent: Wednesday, February 01, 2012 3:01 PM
To: Email discussion list for the FieldTrip project
Subject: Re: [FieldTrip] rereferencing after preproc

Hi Michael,

Probably ft_preprocessing with the options cfg.reref = 'yes'  and
cfg.refchannel = '<your ref channel>' is what you are looking for.

ft_preproc_rereference is a lower-level FieldTrip function, which
indeed operates directly on a channel x time matrix. ft_preprocessing
contains all the necessary bookkeeping wrappers around ft_preproc_* so
that you can conveniently apply the preprocessing functions on
FieldTrip-style data structures.

Hope this helps.

Eelke

On 1 February 2012 20:44, Epstein, Michael <MEpstein at nki.rfmh.org>
wrote:
> Hi all,
>
>
>
> I'm trying to analyze a dataset using multiple reference points - is
there a
> way to re-reference the data after the whole preprocessing step? I'm
using
> ft_rejectvisual to clean the data, so I want to reference after that,
in
> order to preserve as much consistency between the two sets as is
possible.
>
>
>
> I was trying to use ft_preproc_rereference to achieve this goal, but
that
> only takes in channel x time data, not trial data or freq data. Is
there a
> different way to rereference?
>
>
>
> Thanks,
>
>
>
> -Michael
>
>
>
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