[FieldTrip] ft_preprocessing filter order

[Alessandro Orticoni]

Hi,

Yes, thanks both! You have been very helpful.

Best,
Alessandro

Il giorno mer 17 ott 2018 alle ore 00:17 Diego Lozano-Soldevilla <
dlozanosoldevilla at gmail.com> ha scritto:

> Hi Alessandro,
>
> As explained in the help
> <https://github.com/fieldtrip/fieldtrip/blob/master/ft_preprocessing.m#L55>of
> ft_preprocessing, the default filter order can be found in the low level
> functions:
> fieldtrip/preproc/ft_preproc_bandpassfilter.m
> fieldtrip/preproc/ft_preproc_bandstopfilter.m
> fieldtrip/preproc/ft_preproc_highpassfilter.m
> fieldtrip/preproc/ft_preproc_lowpassfilter.m
>
> The filter order means something very different for the Butterworth (i.e.
> amount of samples used for the input-output recursion)
>
> https://github.com/fieldtrip/fieldtrip/blob/master/preproc/ft_preproc_bandpassfilter.m#L151
>
> or for the Finite Impulse Response (FIR) filter (i.e. length of the filter
> kernel).
>
> https://github.com/fieldtrip/fieldtrip/blob/master/preproc/ft_preproc_bandpassfilter.m#L235
>
> For the ones interested to know more about what that number does for
> different filters, please check this example script:
>
> http://www.fieldtriptoolbox.org/example/determine_the_filter_characteristics
>
> I hope that helps,
>
> Diego
>
>
> On Tue, 16 Oct 2018 at 23:13, Alessandro Orticoni <
> alessandro.orticoni at gmail.com> wrote:
>
>> Dear all,
>>
>> I would like to ask you just a question: which is the default order of
>> the filters implemented by ft_preprocessing? I cannot find it anywhere.
>>
>> Thanks a lot,
>> Alessandro Orticoni
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>> https://doi.org/10.1371/journal.pcbi.1002202
>>
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