[FieldTrip] rereferencing after preproc

[Ingrid Nieuwenhuis]

Hi, just a little addition. You mention freq data, but you can't 
re-reference after freq analysis. Has to take place before. (Just in 
case you meant that)
Good luck,
Ingrid

-- 
Ingrid Nieuwenhuis PhD
Postdoctoral Fellow
Sleep and Neuroimaging Laboratory
Department of Psychology
University of California, Berkeley
California 94720-1650
Tolman Hall, room 5305


On 2/1/2012 12:05 PM, Epstein, Michael wrote:
> 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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-- 
Ingrid Nieuwenhuis PhD
Postdoctoral Fellow
Sleep and Neuroimaging Laboratory
Department of Psychology
University of California, Berkeley
California 94720-1650
Tolman Hall, room 5305