[Eeglablist] Component clustering - problem with dividing each subject into different epochs

[Makoto Miyakoshi]

Dear Naga,

Maybe you misunderstood something basic.
In your Subject 1, let's say there are 25 epochs in condition A. This means
there are 25 trials. If you check your size(EEG.data) of the Subject 1, it
should be (x,x,25) notice the third one is 25-this means it has 25 epochs.

As long as you have these 25 epochs under the same condition, you'll have
only 1 IC for it, not 25.

Why don't you tell me the factorial design of your experiment?

Makoto


2014-03-17 17:16 GMT-07:00 Dasari, Naga Mallikarjuna Rao - dasnm001 <
naga.dasari at mymail.unisa.edu.au>:

>  Dear all,
>
>
>
> I am trying to use component clustering tool in the eeglab.
>
>
>
> I have divided each subject's data into 500ms epochs.  For 5 subjects I
> got 25 epochs and consider each of them as an individual subject for
> analysis purpose.  Then created a study using 25 epochs.  When I use 'Build
> Pre-clustering array', it is creating a parent cluster with only 150 ICs
> (5X30) instead of 750 ICs (25x30).
>
>
>
> I have computed ICA weights before dividing the each subject's data into
> individual epochs.
>
>
>
> I am not sure what is the reason behind this.
>
>
>
> Thank you for your time and help.
>
>
>
> Kind Regards,
>
> Naga
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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