[Eeglablist] Cleanline and Basic FIR filter
Eric HG
erichg2013 at gmail.com
Sat Aug 29 11:16:36 PDT 2015
Hi everyone,
I have some questions about both cleanline and the basic FIR filter:
1) Do you have any recommendation about which one should be used first? At
the moment I'm doing this (cleanline first and then bandpass filtering):
[EEG, Sorig, Sclean, f, amps, freqs, g] = pop_cleanline(EEG,
'Bandwidth',2,'ChanCompIndices',[1:EEG.nbchan], ...
'SignalType','Channels','ComputeSpectralPower',true, ...
'LineFrequencies',[50 100]
,'NormalizeSpectrum',false, ...
'LineAlpha',0.01,'PaddingFactor',2,'PlotFigures',false, ...
'ScanForLines',true,'SmoothingFactor',100,'VerboseOutput',1, ...
'SlidingWinLength',EEG.pnts/EEG.srate,'SlidingWinStep',EEG.pnts/EEG.srate);
EEG = pop_eegfiltnew(EEG, 1, 70, 1650, 0, [], 1);
2) I'm doing the filtering before epoching the data (on continuous data).
Can that lead to any problem with the filtering?
In cleanline: Both the 'SlidingWinLength' and 'SlidingWinStep' are the
length of the recording. However, the 'SmootingFactor is 100, which
shouldn't matter when the window length = EEG length.
3) Is there an easy way to figure out the filter order for pop_eegfiltnew?
The current 1650 is just what was decided through the GUI.
Thanks a lot in advance.
Best,
Eric
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