[Eeglablist] Matrix of ICA component activations (time courses)

[omid abbasi]

Dear Maktoo

Thank you for your answer.
Yes. I have these two matrix (EEG.icaweights and EEG.icasphere)  in my EEG
structure but eeg_checkset doesn't work.Is there any solution to i
calculate component activation using for example these matrix?

Best Wishes
Omid


On Wed, Aug 7, 2013 at 4:40 AM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>wrote:

> Dear Omid
>
> In order for eeg_checkset to work you should have EEG.icaweights and
> EEG.icasphere. Please check if you have these two in your EEG structure.
>
> Makoto
>
>
> 2013/8/6 omid abbasi <omidabbasi2000 at gmail.com>
>
>> Dear Maktoo
>>
>> Thank you for your answer
>>
>> EEG.icaact is an empty matrix in my workspace. I applied the command (EEG
>> = eeg_checkset(EEG, 'ica');) that you said but again EEG.icaact is empty.
>> What should i do now. Is there any other solution?
>>
>> Best Wishes
>> Omid
>>
>>
>> On Mon, Aug 5, 2013 at 9:25 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>wrote:
>>
>>> Dear Omid,
>>>
>>> It is EEG.icaact that has the size of number of IC x data length. If you
>>> don't see it, run this
>>> EEG = eeg_checkset(EEG, 'ica');
>>>
>>> Maktoo
>>>
>>>
>>> 2013/8/5 omid abbasi <omidabbasi2000 at gmail.com>
>>>
>>>>  Hi all
>>>>
>>>> I imported an EEG signal with 7 epochs to EEGLAB and i applied ICA to
>>>> remove some artifacts. Now i can plot ICA component activation (time
>>>> courses) using plot>component activations. But i can't find the variable or
>>>> matrix in workspace related to ICA component activation. I know that I can
>>>> find ICA component using EEG.icawinv matrix in workspace.
>>>>
>>>> It means if the ICA decomposition equals:
>>>>
>>>> U=WX
>>>>
>>>> where X (EEG channel recordings) and U (ICA component activations) are
>>>> n *t matrices (n channels (rows) by t time points (columns)), and W (ICA
>>>> weights (EEG.icawinv )) is n* n. I want to know how i can have matrix of U
>>>> in EEGLAB?
>>>>
>>>>
>>>> Best Wishes
>>>> Omid
>>>>
>>>>
>>>> On Fri, Aug 2, 2013 at 9:00 PM, <eeglablist-request at sccn.ucsd.edu>wrote:
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>>>>>    1. 2013 EEGLAB workshop at UCSD following SFN,       November 14-18,
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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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