ika16 wrote:
> If I get 10 x 2 design matrix, how can I put it into SPM?
> Need Matlab code or anything else?
It's easier to let SPM create the design matrix based on the model
that you specify with the GUI. Otherwise, I think you have to manually
set up the structures in the SPM.mat (see e.g.
spm_config_factorial_design.m).
I haven't found an easy way to manually set up a simple case for
spm_spm to estimate -- hopefully someone will correct me here if I'm
missing something.
If you do just want a simple Ordinary Least Squares estimation from a
specified design matrix, then you could probably code it up yourself
fairly quickly, using the standard expressions (e.g. beta =
(X'*X)\X'*y etc) and SPM functions to read the image data.
> And a covariate vector always has to be one column vector?
Yes, a column is a covariate.
> If a covariate is a column of the design matrix,
> how can I put two columns of covariates into SPM?
> Have twice for "New Covariate"?
Sounds good to me!
Best,
Ged.
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