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

[Makoto Miyakoshi]

Dear Omid,

That is weird. How about this? This is line 977 of eeg_checkset.

EEG.icaact = (EEG.icaweights*EEG.icasphere)*EEG.data(EEG.icachansind,:);

Makoto


2013/8/7 omid abbasi <omidabbasi2000 at gmail.com>

> Dear Makoto
>
> I have all of matrix that you mentioned (EEG.data, EEG.icaweights, and
> EEG.icasphere). But when i write this command line (EEG = eeg_checkset(EEG,
> 'ica');) in the command window, it runs without any error but again
> EEG.icaact is empty (EEG.icaact=[ ]).
>
> Best Wishes
> Omid
>
>
> On Wed, Aug 7, 2013 at 6:35 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>wrote:
>
>> Dear Omid,
>>
>> If you have EEG.data, EEG.icaweights, and EEG.icasphere it should work.
>> What does the error message say? Could you copy it here?
>>
>> Makoto
>>
>>
>> 2013/8/6 omid abbasi <omidabbasi2000 at gmail.com>
>>
>>> 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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>>>>>>
>>>>>>
>>>>>> --
>>>>>> 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
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