Dear Wang Liang,
the part of the SPM structure describing the estimated error covariance is
similar for all SPM designs, so it doesn't matter whether one looks at
first or second level statistics. The number of covariance components
estimated is just the number of elements in xVi.Vi or xVi.h.
I don't know what your second question is about... Of course, you will
only find xVi.h and xVi.V after you have estimated your model.
Volkmar
On Mon, 18 Jun 2007, Wang Liang wrote:
> Dear SPMers,
> I have two questions for your help.
> 1).How to determine the number of variance components SPM provided when
> proceeding a first level statistic
> 2) Based on the xVi.h, xVi.Vi{i} and xVi.V in the SPM.mat file, I cann't
> acquire the equation xVi.V = xVi.h(1)*xVi.Vi{1}+ ¡¡ which is hint in
> spm_spm.m
>
> with best regards!
>
> wangliang
>
--
Volkmar Glauche
-
Department of Neurology [log in to unmask]
Universitaetsklinikum Freiburg Phone 49(0)761-270-5331
Breisacher Str. 64 Fax 49(0)761-270-5416
79106 Freiburg http://fbi.uniklinik-freiburg.de/
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