Dear Vladimir,
When I reduce the number of frequency modes I do not get the warning, however the csd seems not to be calculated.
best,
Stephan
El 24/05/2012, a las 13:00, Stephan Moratti escribió:
> Hi Vladimir
>
> I tried to do DCM (SSR) on a time frequency window of interest of my MEG data (Elekta Neuromag) with magnetometer sensor data. I get the following errors:
>
>
> evaluating condition 2 (trial 62)Warning: Matrix is close to singular or badly scaled.
> Results may be inaccurate. RCOND = 5.917766e-22.
> > In spm_mar at 166
> In spm_dcm_ssr_data at 209
> In spm_dcm_ssr at 112
> In spm_api_erp>estimate_Callback at 1074
> In spm_api_erp at 40
> In @(hObject,eventdata)spm_api_erp('estimate_Callback',hObject,eventdata,guidata(hObject))
> Index exceeds matrix dimensions.
>
> Before I had problems doing a group inversion it was due to a scaling problem of the lead fields. After the fixes you have sent me, I recalculated the lead fields and the group inversion worked fine. Now, the current error could be to a similar problem (scaling of the data) ???
>
> Thanks in advance for you help.
>
> Best,
>
> Stephan
>
>
> ________________________________________________________
> Stephan Moratti, PhD
>
> see also: http://web.me.com/smoratti/
>
> Universidad Complutense de Madrid
> Facultad de Psicología
> Departamento de Psicología Básica I
> Campus de Somosaguas
> 28223 Pozuelo de Alarcón (Madrid)
> Spain
>
> and
>
> Center for Biomedical Technology
> Laboratory for Cognitive and Computational Neuroscience
> Parque Científico y Tecnológico de la Universidad Politecnica de Madrid
> Campus Montegancedo
> 28223 Pozuelo de Alarcón (Madrid)
> Spain
>
>
> email: [log in to unmask]
> Tel.: +34 679219982
>
>
________________________________________________________
Stephan Moratti, PhD
see also: http://web.me.com/smoratti/
Universidad Complutense de Madrid
Facultad de Psicología
Departamento de Psicología Básica I
Campus de Somosaguas
28223 Pozuelo de Alarcón (Madrid)
Spain
and
Center for Biomedical Technology
Laboratory for Cognitive and Computational Neuroscience
Parque Científico y Tecnológico de la Universidad Politecnica de Madrid
Campus Montegancedo
28223 Pozuelo de Alarcón (Madrid)
Spain
email: [log in to unmask]
Tel.: +34 679219982
