The additional files from mne are: (from the MNE manual)


fsaverage_head.fif: The approximate head surface triangulation for fsaverage.

fsaverage_inner_skull-bem.fif: The approximate inner skull surface for fsaverage.

fsaverage-fiducials.fif: The locations of the fiducial points (LPA, RPA, and nasion) in MRI coordinates, see Section 7.16.2.

fsaverage-trans.fif: Contains a default MEG-MRI coordinate transformation suitable for fsaverage. For details of using the default transformation, see Section 7.5.


So you don't need any. Would it help to add this information? We could also have an "update" option in which files are copied only if they don't exist yet in your fsaverage folder.




On Sep 10, 2013, at 00:16 , Eric89GXL wrote:

> In mne/transforms/coreg.py:
> 
> > +from ..label import read_label, Label
> > +from ..source_space import read_source_spaces, write_source_spaces
> > +from ..surface import read_surface, write_surface, read_bem_surfaces, \
> > +                      write_bem_surface
> > +from ..utils import get_config, get_subjects_dir
> > +from .transforms import rotation, rotation3d, scaling, translation
> > +
> > +
> > +trans_fname = os.path.join('{raw_dir}', '{subject}-trans.fif')
> > +
> > +
> > +def create_default_subject(mne_root=None, fs_home=None, subjects_dir=None):
> > +    """Create a default subject in subjects_dir
> > +
> > +    Create a copy of fsaverage from the freesurfer directory in subjects_dir
> > +    and add auxiliary files from the mne package.
> 
> That is good. However I'm still not clear on whether people like me, who already have an fsaverage in their subjects_dir (which I imagine is most folks) would absolutely need to or just want to run this function for best functionality (what would be the drawback without doing it?). I assume it's necessary, in which case it might be good to list the necessary files so users can copy them themselves manually if they want. Consider if a user already had an fsaverage with lots of other useful data in it, it would be a bummer to have to figure out what to copy and what not to.
> 
> Maybe an overwrite option would be good that would just copy the mne files over if fsaverage already exists...
> 
> —
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