[FieldTrip] Data prewhitening

[andrea brovelli]

Thank you all for these suggestions, I'll try them out.

bye

Andrea


----- Message de r.vandermeij at donders.ru.nl ---------
     Date : Fri, 14 Sep 2012 13:03:32 +0200
      De : Roemer van der Meij <r.vandermeij at donders.ru.nl>
Répondre à : FieldTrip discussion list <fieldtrip at science.ru.nl>
  Objet : Re: [FieldTrip] Data prewhitening
       À : FieldTrip discussion list <fieldtrip at science.ru.nl>


> Hi Andrea,
>
> Are you referring to pre-whitening by removing the first parameter of
> an auto-regressive model, thereby removing most (if not all) of the 1/f
> shape in the spectrum? If so, this can be done by taking the first
> temporal derivative of the raw-data, effectively setting the first AR
> parameter to 0. This is implemented by setting cfg.derivative = 'yes' in
> preprocessing.
> I don't know of any good references for this trick though, so if anybody
> else can help out, that'd be great.
>
> Best,
> Roemer
>
>
> On Fri, Sep 14, 2012 at 12:27 PM, andrea brovelli <
> andrea.brovelli at univ-amu.fr> wrote:
>
>> Dear all,
>>
>> I was wondering whether we can whiten the data using the cfg options in
>> the ft_preprocessing function. Does anyone know ?
>>
>> Or does anyone have some code for prewhitening raw data ?
>>
>> Thanks a lot
>>
>> Andrea
>>
>>
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>
>
>
> --
> Roemer van der Meij M.Sc.
> PhD student
> Donders Institute for Brain, Cognition and Behaviour
> Centre for Cognition
> P.O. Box 9104
> 6500 HE Nijmegen
> The Netherlands
> Tel: +31(0)24 3655932
> E-mail: r.vandermeij at donders.ru.nl
>


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