[Eeglablist] pop_eegfiltnew help

[Yamil Vidal Dos Santos]

Hi again,
Is equivalent. And actually, you don't need to specify model order, as the
EEGLAB function can pick it automatically.
For example I use it as follows.

EEG = pop_eegfiltnew(EEG, [], 0.1, [], true, [], 0); % Highpass filter 0.1
Hz
EEG = pop_eegfiltnew(EEG, [], 30, [], false, [], 0); % Lowpass filter 30 Hz

I haven't tested but if for any reason you don't want to use revfilt, use
this:
EEG = pop_eegfiltnew(EEG, 0.1, [], [], false, [], 0); % Highpass filter 0.1
Hz

You can always just pick one of your datasets, try different filter setting
and plot the spectra to test the result.
Have fun,
Yamil


On Tue, Nov 29, 2016 at 10:23 PM, Ahmad, Jumana <jumana.ahmad at kcl.ac.uk>
wrote:

> Hi all,
> Thank you for your reply Yamil.
> How do I get the GUI to not use a reverse filter? I am only using the GUI
> to get an automatic setting for the filter length/order. If I now swapped
> the location of the 1, and set the reverse to false should the filter order
> change?
> Do I have to repeat the filtering I've already done? Or is it equivalent?
> Thank you and best wishes,
> Jumana
>
>
> On 29 Nov 2016, at 18:03, Yamil Vidal Dos Santos <
> hvidaldossantos at gmail.com> wrote:
>
> Hi,
> Is because the 5th parameter (revfilt) is set to true, which indeed
> reverses the direction of the filter, turning the lowpass into a hipass.
> I was also confused the first time.
> Cheers,
> Yamil
>
> On 29 Nov 2016 18:55, "Ahmad, Jumana" <jumana.ahmad at kcl.ac.uk> wrote:
>
> Dear all,
>
> I am trying to create a 1Hz dataset. I followed your advice to do this
> first with the GUI. As I want a high pass filter of 1Hz I entered 1 into
> the lower edge of the frequency pass band.
>
> In EEGlab history this gave:
>
>
>
> EEG = pop_eegfiltnew(EEG, [], 1, 1650, true, [], 1);
>
>
>
> However, is the 1 not in the wrong place now? Should not the high pass value go first? From above it seems like [] and 1 should swap places?
>
>
>
> I thought the function was: function [EEG, com, b] = pop_eegfiltnew(EEG, locutoff, hicutoff, filtorder, revfilt, usefft, plotfreqz)
>
>
>
> Thank you,
>
> Jumana
>
>
>
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