[Eeglablist] slow frequency drift

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Fri Jan 24 14:07:48 PST 2014


Dear Eduardo,

Download Cleanline (not clean_rawdata) from here. It's written by Tim
Mullen, the author of SIFT.
http://sccn.ucsd.edu/wiki/Plugin_list_process

Makoto


2014/1/23 Makoto Miyakoshi <mmiyakoshi at ucsd.edu>

> Dear Eduardo,
>
> For line noise, use CleanLine.
> For slow frequency drifting, you may either 1Hz high-pass (make sure you
> are using the latest EEGLAB since filter function underwent major update
> between 11 and 12) or linear detrending that you can use as a proprocess
> for SIFT by Tim Mullen. These methods don't reject datapoints.
>
> clean_rawdata also has a high-pass. You may want to try more aggressive
> parameters. ASR is not much for baseline drift correction.
>
> Makoto
>
>
> 2014/1/22 eduardo schenberg <edueeg at gmail.com>
>
>>  Hello all
>>
>> I used ICA to remove line noise and movement artifacts from my continuous
>> data, but some slow frequecny drifts are still present and clearly visible
>> on the tracings, also affecting yhe spectrum at these freqs
>>
>> I already tried the "clean_rawdata" plugin to remove these drifts, but it
>> seemed to also affect (unfortunately) alpha oscillations
>>
>> Is there any other options to correct these drifts (without deleting data
>> segments) that any of you would recommend?
>>
>> many tks
>>
>> eduardo
>>
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>
>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>



-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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