[Eeglablist] detrending with SIFT

[Makoto Miyakoshi]

Yeah it may be 'varargin' for all the inputs... in that case I would use a
debug mode to stop the execution at some line and use GUI with desired
param. When the process is stopped check varargin to learn what's inside.
Or it may be kindly described somewhere in SIFT manual or his function. Tim
usually prepares very good documentation.

Makoto

On Thu, Dec 4, 2014 at 9:58 PM, Tyler Grummett <
tyler.grummett at flinders.edu.au> wrote:

>  With regard to that code (rather than the GUI) how would you turn
> normalizing off?
>
>
>  Tyler
>
>
>    *************************
>
>  *Tyler Grummett ( BBSc, BSc(Hons I))*
> *PhD Candidate*
> *Brain Signals Laboratory*
> *Flinders University*
> *Rm 5A301*
> *Ext 66125*
>     ------------------------------
> *From:* Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> *Sent:* Friday, 5 December 2014 4:14 PM
>
> *To:* Tyler Grummett
> *Cc:* eeglablist at sccn.ucsd.edu
> *Subject:* Re: [Eeglablist] detrending with SIFT
>
>  Hmm... is that because you are using 'NormalizeData'? To test this, why
> don't you make comparison with and without it? The low end does look
> attenuated, which makes sense.
>
>  By the way uncheck 'use single precision...' option when you use SIFT.
>
>  Makoto
>
> On Thu, Dec 4, 2014 at 9:00 PM, Tyler Grummett <
> tyler.grummett at flinders.edu.au> wrote:
>
>>  Hello Makoto,
>>
>>
>>  > I've never tried it, so I don't know. However, as long
>> as EEG.CAT.srcdata has the same size as EEG.data, yes I would take it.
>>
>> I transferred the data but the spectra doesnt look right.
>>
>>  Is it meant to reduce the energy that much? I would have thought it
>> would only effect the low frequencies
>>
>>  Tyler​
>>
>>
>>
>>    *************************
>>
>>  *Tyler Grummett ( BBSc, BSc(Hons I))*
>> *PhD Candidate*
>> *Brain Signals Laboratory*
>> *Flinders University*
>> *Rm 5A301*
>> *Ext 66125*
>>     ------------------------------
>> *From:* Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
>> *Sent:* Friday, 5 December 2014 2:41 PM
>> *To:* Tyler Grummett
>>
>> *Subject:* Re: [Eeglablist] detrending with SIFT
>>
>>   I've never tried it, so I don't know. However, as long
>> as EEG.CAT.srcdata has the same size as EEG.data, yes I would take it.
>>
>>  Makoto
>>
>> On Thu, Dec 4, 2014 at 8:04 PM, Tyler Grummett <
>> tyler.grummett at flinders.edu.au> wrote:
>>
>>>  ​Hey Makoto,
>>>
>>>
>>>  Is there a necessary step after that? If you just wanted to detrend
>>> your data.
>>>
>>>
>>>  ie EEG.data = EEG.CAT.srcdata;
>>>
>>>
>>>  Tyler
>>>
>>>
>>>    *************************
>>>
>>>  *Tyler Grummett ( BBSc, BSc(Hons I))*
>>> *PhD Candidate*
>>> *Brain Signals Laboratory*
>>> *Flinders University*
>>> *Rm 5A301*
>>> *Ext 66125*
>>>     ------------------------------
>>> *From:* Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
>>> *Sent:* Friday, 5 December 2014 1:05 PM
>>> *To:* Tyler Grummett
>>> *Cc:* eeglablist at sccn.ucsd.edu
>>> *Subject:* Re: [Eeglablist] detrending with SIFT
>>>
>>>   Dear Tyler,
>>>
>>>  > I went through the code and it appears as though it is storing the
>>> data in EEG.CAT.
>>>
>>>  Yes, that sounds right. I don't think SIFT changes EEG.data.
>>>
>>>  Makoto
>>>
>>> On Thu, Dec 4, 2014 at 5:06 AM, Tyler Grummett <
>>> tyler.grummett at flinders.edu.au> wrote:
>>>
>>>>  Hello eeglabers,
>>>>
>>>>
>>>>  I have a question about detrending in SIFT.
>>>>
>>>>
>>>>  I run the following code:
>>>>
>>>>
>>>>  EEG = pop_pre_prepData( EEG, 'nogui', ...
>>>>                 'VerbosityLevel', 2,   ...
>>>>                 'SignalType', { 'Channels'},  ...
>>>>                 'Detrend',  ...
>>>>                 { 'verb', 2 ...
>>>>                 'method', {'linear'}, ...
>>>>                 'piecewise', ...
>>>>                 {'seglength', 0.33,   ...
>>>>                 'stepsize', 0.0825}, ...
>>>>                 'plot', strcmp( plot, 'on')},  ...
>>>>                 'NormalizeData', ...
>>>>                 {'verb', 2 ...
>>>>                 'method', {'time' 'ensemble'}}, ...
>>>>                 'resetConfigs',true);​
>>>>
>>>>  It works fine, but I do an is equal on the data before and after and
>>>> they are identical.
>>>>
>>>>  Im thinking this cant be correct because it should be removing a
>>>> significant proportion of my data.
>>>>  I went through the code and it appears as though it is storing the
>>>> data in EEG.CAT. Have I missed
>>>>  something or am I doing it correctly?
>>>>
>>>>  Kind regards,
>>>>
>>>>  Tyler
>>>>
>>>>
>>>>
>>>>    *************************
>>>>
>>>>  *Tyler Grummett ( BBSc, BSc(Hons I))*
>>>> *PhD Candidate*
>>>> *Brain Signals Laboratory*
>>>> *Flinders University*
>>>> *Rm 5A301*
>>>> *Ext 66125*
>>>>
>>>> _______________________________________________
>>>> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
>>>> To unsubscribe, send an empty email to
>>>> eeglablist-unsubscribe at sccn.ucsd.edu
>>>> For digest mode, send an email with the subject "set digest mime" to
>>>> eeglablist-request at sccn.ucsd.edu
>>>>
>>>
>>>
>>>
>>>  --
>>>  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
>>
>
>
>
>  --
>  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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20141204/1b999375/attachment.html>