[Eeglablist] Flat data in a continuous EEG & Linear Regression

[Makoto Miyakoshi]

> for some reason 'clean_rawdata' didn't work.

What do you mean 'did not work'? Did you get error messages, or were you
not satisfied with the results? It's actually possible that ASR removed the
interesting EEG that is time-locked to noise from walking... but it's still
worth trying.

> Do you interpolate the removed channels?

No.

Makoto

On Mon, Aug 11, 2014 at 11:52 AM, Srinivas Kota <svkota at gmail.com> wrote:

> Thanks Makoto. My data was while participant walking on treadmill, for
> some reason 'clean_rawdata' didn't work. I tried other dataset where
> participant was sitting in a chair. Your method worked great. It removed 5
> channels from the data. Do you interpolate the removed channels?
>
> Srini
>
>
> On Mon, Aug 11, 2014 at 1:47 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> wrote:
>
>> Dear Srini,
>>
>> Please try 'clean_rawdata()'. It has a flat channel removal function.
>> http://sccn.ucsd.edu/wiki/Plugin_list_process
>>
>> Makoto
>>
>>
>> On Wed, Jul 30, 2014 at 11:02 AM, Jerry Zhu <jerryzhu at siu.edu> wrote:
>>
>>> Hi Srinivas,
>>>
>>> Flat lines have limited variable data. So you can try:
>>>
>>>     devStd = std(EEG.data(:,:), [], 2);
>>>     if any(devStd == 0)
>>>         flatchan = find(devStd == 0)';
>>>    end
>>>
>>> If you need complete codes, feel free to email me.
>>>
>>> Good luck with your study!
>>> Jerry
>>>
>>> --
>>> Jian Zhu, M.A.
>>> Brain and Cognitive Sciences
>>> Department of Psychology
>>> Southern Illinois University Carbondale
>>> Web: http://zhupsy.com
>>>
>>> We have two halves in the brain: left and right. Nothing is right in the
>>> left. Nothing is left in the right.
>>>
>>>
>>> On Wed, Jul 30, 2014 at 10:46 AM, Srinivas Kota <svkota at gmail.com>
>>> wrote:
>>>
>>>> Hello
>>>>
>>>> I have a few portions of flat data in a continuous EEG. Is there any
>>>> better way over visual inspection to reject those flat lines from
>>>> continuous EEG?
>>>>
>>>>
>>>> Gwin et. al 2010, (movement artifacts during walking/running) mentioned
>>>> "linearly regress artifact template from the data". What is the built-in
>>>> routine in EEGLAB to perform this?
>>>>
>>>> Best Regards,
>>>> Srini.
>>>>
>>>>
>>>> --
>>>>
>>>> ***********************************************************
>>>> Srinivas Kota, Ph.D
>>>> Research Scientist
>>>> Movement and Neurosciences Center
>>>> Institute for Rehabilitation Science and Engineering
>>>> Madonna Rehabilitation Hospital
>>>> 5401 South St, Lincoln, NE 68506
>>>> www.madonna.org/research_institute/index.html
>>>> <https://owa.madonna.org/owa/redir.aspx?C=RNnR5lrQvEmYU7lVtl6kLHIjwe3PiNAI8ouI90lD2Vnn4niuQ5QMBdLYDKmByFhfb525xS5XXT8.&URL=http%3a%2f%2fwww.madonna.org%2fresearch_institute%2findex.html>
>>>> ***********************************************************
>>>>
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>>
>>
>>
>> --
>> Makoto Miyakoshi
>> Swartz Center for Computational Neuroscience
>> Institute for Neural Computation, University of California San Diego
>>
>
>
>
> --
>
> ***********************************************************
> Srinivas Kota, Ph.D
> Research Scientist
> Movement and Neurosciences Center
> Institute for Rehabilitation Science and Engineering
> Madonna Rehabilitation Hospital
> 5401 South St, Lincoln, NE 68506
> Email: svkota at gmail.com
> Ph:  (618) 319-0471 (cell)
> www.madonna.org/research_institute/index.html
> <https://owa.madonna.org/owa/redir.aspx?C=RNnR5lrQvEmYU7lVtl6kLHIjwe3PiNAI8ouI90lD2Vnn4niuQ5QMBdLYDKmByFhfb525xS5XXT8.&URL=http%3a%2f%2fwww.madonna.org%2fresearch_institute%2findex.html>
> ***********************************************************
>



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