[Eeglablist] baseline correction of cluster ERP in STUDY

[C Kalfaoglu]

Hi Makoto,

Thank you, that was very helpful (apparently this was what I've been 
looking for: 'erpparams',{'rmbase' [-6000 -200] }).

Its a very small thing, but I think there is a typo (which may already 
be fixed in later versions) on line 30 of the std_precomp function:

%  'erpparams'   - [cell array] Parameters for the std_spec function. 
See std_spec for more information.

Should 'std_spec' be 'std_erp'? This is probably obvious to most but I 
thought I'd bring it up anyway.

Thank you,

C


On 29/05/12 19:51, Makoto Miyakoshi wrote:
> Dear C,
>
>> So my question is: Is there a way to change the ERP baseline within the
>> STUDY structure, or do I have to re-epoch all my datasets separately
>> outside the STUDY, and create a new STUDY with different baseline periods?
>  From GUI, you can specify the baseline for ERP when running precompute.
>
> There is of course another method outside GUI, which is to edit
> STUDY.cluster(1,x).icaerp (if I remember correctly). Run 'plot erp'
> for all cluster once, and press ok to close the GUI (this updates your
> STUDY in the workspace) and you'll find STUDY.cluster(1,x).icaerp. If
> you are not sure about it, please let me know.
>
> Makoto
>
> 2012/5/24 C Kalfaoglu<c.kalfaoglu at sheffield.ac.uk>:
>> Hi all,
>>
>> I am sorry for repeating an already asked question (the subject of this
>> email is copied from a thread in the eeglab archive), but the answer
>> doesn't seem to be very clear to me.
>>
>> I've created a study using the whole epoch length as the baseline for
>> ERP and ERSP (i.e. from 1000*ALLEEG(1).xmin to 1000*ALLEEG(1).xmax).
>>
>> Now I would like to change the basline period.
>> Changing the baseline period for ERSP seems straight forward through:
>>
>> std_precomp( ... ,
>>      'erspparams',{... ,'baseline', [1000*ALLEEG(1).xmin -200], ... },
>>       ...).
>> I am assuming the baseline specified here will only affect the ERSP and
>> ITC measures.
>>
>> However, similar options in 'erpparams' or 'std_erp' don't seem to exist
>> for changing the erp baseline?
>>
>> So my question is: Is there a way to change the ERP baseline within the
>> STUDY structure, or do I have to re-epoch all my datasets separately
>> outside the STUDY, and create a new STUDY with different baseline periods?
>>
>> Thank you,
>> C
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