All the information necessary for creating a head model in SPM cannot
be extracted from a Fieldtrip structure because it's not there
(particularly fiducials). So what you need to do is to use the
function 'Copy MEG sensors' in MEEGTools toolbox (spm_eeg_copygrad) to
read this information from on of the raw files and add it to your SPM
On 7 Feb 2012, at 18:37, Stenner, Max-Philipp wrote:
> Dear Vladimir,
> I am trying to convert ERF data from fieldtrip structures to spm-
> compatible objects using spm_eeg_ft2spm for source reconstruction.
> Information on sensor position and fiducials is not stored in the
> object that results from spm_eeg_ft2spm when using either
> grandaverages or individual timelock-data gathered across several
> sessions. It might be a silly question but is conversion to the spm
> format hence only reasonable at earlier stages, i.e. when the
> fieldtrip structure still contains the grad field?
> Thank you very much!