Dear Sander,
see spm_fmri_spm_ui, in particular:
Sess{s}.ons{i} contains stimuli onset times for ith trial type (sescs)
Sess{s},bf{i} basis functions for ith trial type
xX.X returns the design matrix
xX.Xnames cellstr of effect names corresponding to columns of the design
matrix
Note that xX.RT returns the repetition time in secs which helps to redefine
the onsets according to scans (onsets in secs / RT in secs).
Regards-
Andreas
****************************************************************************
*******
Dr. Andreas J. Bartsch phone: +49 (0)931-201-0
Division of Neuroradiology,
ecr.: -5791
BJMU Wuerzburg pager:
#5325
Josef-Schneider-Str. 11 fax: +49
(0)931-201-2685
97080 Wuerzburg email: [log in to unmask]
Germany [log in to unmask]
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----- Original Message -----
From: "Daselaar, S.M." <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, October 23, 2001 9:21 AM
Subject: how to deconstruct the SPM design matrix?
> Dear SPMers,
>
> A data file containing scan onsets and behavioral measures of one of our
> subjects has been lost. However, we still got the SPM design matrix and
> results of this subject. Does anyone know how to extract scan onsets back
> from the design matrix?
>
> Thanks,
>
> Sander
>
> S.M. Daselaar
> EMGO department
> VU Medical Centre
> vd Boechorstraat 7
> 1081 BT Amsterdam
> The Netherlands
> Tel: +31 (0)20 4444280
> Fax: +31 (0)20 4446775
> e-mail: [log in to unmask]
