Dear Vladimir,

My mistake for not explaining.

In various articles of Garrido et al. (2007;2008;2009), they state that 'the use of three principal eigenvariates (spatial modes) preserved more than 73% of the variance in all subjects.' I was wondering how someone can test that? I have used 8 spatial modes, how can i test how much variance they explain in al subjects? Where are these values stored?

Hope that it is clearer now!

Best

Zoi

P.S. Thanks for taking the time

Von: Vladimir Litvak <[log in to unmask]>
An: Zoi Da <[log in to unmask]>
CC: [log in to unmask]
Gesendet: Donnerstag, den 19. November 2009, 15:23:17 Uhr
Betreff: Re: [SPM] WG: DCM_EEG

Dear Zoi,

It's not quite clear to me what you want to do. Perhaps you could
describe the aim of your analysis and then it's be easier to help you.

Best,

Vladimir

2009/11/19 Zoi Da <[log in to unmask]>:
>
>
> ----- Weitergeleitete Mail ----
> Von: Zoi Da <[log in to unmask]>
> An: [log in to unmask]
> Gesendet: Donnerstag, den 19. November 2009, 14:56:12 Uhr
> Betreff: DCM_EEG
>
> Hi everyone
>
> My name is Zoi and I have been analyzing EEG data with DCM. I have computed
> the DCMs to eight spatial modes. I would like know how I can compute the
> variance of the data?
>
> Thanks a lot
>
>
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