Try re-doing all the 'template', 'coregistration', 'forward model'
steps on those problematic datasets AFTER marking the EEG channels as
bad.
Vladimir
On Tue, Oct 12, 2010 at 4:00 PM, Astle, Duncan <[log in to unmask]> wrote:
> Hi Vladimir,
>
> I tried that, and according to the channels list it certainly doesn't think that there are any EEG channels. However, when I try the inversion I still get this message:
>
> ??? Error using ==> spm_eeg_lgainmat at 32
> No good EEG channels were found.
>
> Error in ==> spm_eeg_invert at 182
> [L D{i}] = spm_eeg_lgainmat(D{i});
>
> Error in ==> spm_eeg_invert_ui at 103
> D = spm_eeg_invert(D);
>
> Error in ==> spm_eeg_inv_imag_api>Inverse_Callback at 94
> handles.D = spm_eeg_invert_ui(handles.D);
>
> Error in ==> spm_eeg_inv_imag_api at 53
> feval(varargin{:}); % FEVAL switchyard
>
> ??? Error while evaluating uicontrol Callback
>
> Any ideas?
>
>
> Thanks
> Duncan
>
> _________________________________________________
> Dr. Duncan Astle,
> British Academy Research Fellow and University Lecturer,
> Department of Psychology,
> Royal Holloway,
> University of London.
>
> [log in to unmask]
>
> -----Original Message-----
> From: Vladimir Litvak [mailto:[log in to unmask]]
> Sent: 12 October 2010 15:42
> To: Astle, Duncan
> Cc: [log in to unmask]
> Subject: Re: [SPM] MEG invertion problem
>
> Dear Duncan,
>
> Changing the channel type to 'Other' should do the job. Just make sure
> that you save the dataset properly (either do save(D) in a script or
> press the 'Save' button in the GUI). If you change the channel type
> and you then open the dataset again in the reviewing tool there should
> not be any channels with 'EEG' type there.
>
> Vladimir
>
> On Tue, Oct 12, 2010 at 3:37 PM, Duncan Astle <[log in to unmask]> wrote:
>> Dear all......
>>
>> So I am attempting to do a group invertion with my MEG data. Everything seems to be working fine, apart from for 3 of the participants' data sets. For these I think it is trying to use the 'EEG channels' - but there arn't any, and ultimately the invertion fails. It thinks this because there was an one electrode marked as an EEG electrode. I have tried changing the channel information, so that it is listed as 'other', but it still doesn't work.
>>
>> Could some one clever please help me find out why it thinks that there are EEG channels, and how to stop it. The other participants' data seem to work fine......
>>
>> Many thanks,
>> Duncan
>>
>
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