[FieldTrip] High-pass filter - 0.1

[Eelke Spaak]

Dear Emilie,

The error message you include only specifies *where* in the code the
error happened, not *what* the actual error was. Could you include the
actual error as well? Perhaps someone can then help you fix it. (In
general there is no fixed lower limit on filter low-/highpass
frequency, although a practical limit could depend on your data.)

Best,
Eelke

On 9 August 2014 09:31, Caspar, Emilie <e.caspar at ucl.ac.uk> wrote:
> Dear Fieldtrip members,
>
> I would like to apply to my data a bandpass filter from 0.016 (or at least
> 0.1) to 30 Hz
>
> bpfilterRange = [.1 30];
>
> However, it seems that Fieltrip doesn't accept small high-pass filter
> values. I have the following mistake :
>
>
> Error in preproc (line 299)
> if strcmp(cfg.bpfilter, 'yes'),     dat = ft_preproc_bandpassfilter(dat,
> fsample, cfg.bpfreq, cfg.bpfiltord,
> cfg.bpfilttype, cfg.bpfiltdir, cfg.bpinstabilityfix); end
>
> Error in ft_preprocessing (line 559)
>       [cutdat{i}, label, time{i}, cfg] = preproc(dat, hdr.label(rawindx),
> tim, cfg, begpadding, endpadding);
>
> Error in preprocessing_Libet (line 70)
>     allData_prepross      = ft_preprocessing(cfg);
>
> I also tried with 0.2, 0.5, and the minimum acceptable I found was 0.9,
> which is quite high.
>
> I wonder if the problem comes from my data (but I had no problems on others
> programs) or if there is a way to apply 0.1 high-pass filter on Fieldtrip?
>
> Thank in advance,
>
> Emilie
>
>
>
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>
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