[FieldTrip] ft_preprocessing filter order

[Alessandro Orticoni]

Hi Robert,

Thanks a lot.

Best,
Alessandro

Il giorno mer 17 ott 2018 alle ore 13:09 Robert Oostenveld <
r.oostenveld at donders.ru.nl> ha scritto:

> Hi Alessandro
>
> If you would want to apply them in a different order, just call
> ft_preprocessing multiple times, once for every filter you want to apply.
>
> best
> Robert
>
>
> On 17 Oct 2018, at 00:54, Alessandro Orticoni <
> alessandro.orticoni at gmail.com> wrote:
>
> 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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