[FieldTrip] ft_preproc_dftfilter function

[Elias P. Casula]

Thanks Jorn, 
Unfortunately in my case the signal remains exactly the same after the dft filter. Maybe there is something that I'm missing in the procedure?

When I call the function I just insert my data matrix, the sampling frequency  (1024) and the frequency band that I want to filter (50). The function generates a new file but apparently nothing changes.

> Date: Fri, 2 May 2014 08:51:11 +0200
> From: jm.horschig at donders.ru.nl
> To: fieldtrip at science.ru.nl
> Subject: Re: [FieldTrip] ft_preproc_dftfilter function
> 
> Hi Elias,
> 
> please see
> http://fieldtrip.fcdonders.nl/faq/why_is_there_a_residual_50hz_line-noise_component_after_applying_a_dft_filter
> that should enlighten you :)
> 
> Best,
> Jörn
> 
> On 5/1/2014 11:54 PM, Elias P. Casula wrote:
> >
> > Dear all,
> > I found some problems with the ft_preproc_dftfilter function. This 
> > function should remove the 50hz noise from the signal. But when I call 
> > the function with
> >
> > [filt] = ft_preproc_dftfilter(mymatrixdata, 1024, 50)
> >
> > the 50hz noise is still in the filtered signal. Does anyone else had 
> > the same problem?
> > Thanks a lot,
> >
> > Elias
> >
> >
> >
> >
> >
> >
> > _______________________________________________
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> > fieldtrip at donders.ru.nl
> > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> 
> 
> -- 
> Jörn M. Horschig
> PhD Student
> Donders Institute for Brain, Cognition and Behaviour
> Centre for Cognitive Neuroimaging
> Radboud University Nijmegen
> Neuronal Oscillations Group
> FieldTrip Development Team
> 
> P.O. Box 9101
> NL-6500 HB Nijmegen
> The Netherlands
> 
> Contact:
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> Tel:    +31-(0)24-36-68493
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> 
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