Hi everyone,
I have a little problem and maybe somebody can help me on that. I have to admit that I am a newbe with SPM and DCM.
I am trying to make a comparison between DCM and other methods (Granger Causality and unified SEM), using fictional time-series data.
This data consists of 5 trials with 1000 datapoints on 5 sources, so it is similar to EEG data (for example after performing an ICA). So I tried to analyse this fictional data just as EEG-Data. For this I used the script "spm_eeg_convert_arbitrary_data.m" which converts my time-series data. Then I used the convert function (this works), but in the upcoming graphic interface the first error messages occures in the EEG tab. When I click on one of the 4 buttons "increase/decrease contrast/width of the plotted time window" nothing happens and the following error message occures:
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??? Reference to non-existent field 'gpa'.
Error in ==> spm_eeg_review_callbacks>updateDisp at 1100
ud = get(D.PSD.handles.gpa,'userdata');
Error in ==> spm_eeg_review_callbacks at 412
updateDisp(D,3);
??? Error while evaluating uicontrol Callback
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I also get an error message when I click on the different trials:
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??? Error using ==> set
Values must be monotonically increasing
Error in ==> spm_DisplayTimeSeries at 347
set(ud.v.handles.gpa,...
Error in ==> spm_eeg_review_callbacks>updateDisp at 994
ud = spm_DisplayTimeSeries(D.data.y(:,:,trN(1))',options);
Error in ==> spm_eeg_review_callbacks at 723
updateDisp(D,1)
??? Error while evaluating uicontrol Callback
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What do those errors mean?
When I ignore all this and open the DCM menu and load the dataset, the message "Reference to non-existent field 'DCM'." comes up, so I cannot perform a DCM on the data.
Does anybody have an idea what the problem may be?
Or does anybody know whether it is possible to perform a 'pure' DCM analysis without a head-model or ICA?
Thanks for your help!
Jakob
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