Download some relevant files from the FreeSurfer v6 fsaverage3 subject. The files are subject to the FreeSurfer software license, see parameter 'accept_freesurfer_license' for details. This data is not required for the package to work. If you are working on a machine that has FreeSurfer installed, you already have this data anyways and do not need to download it. Also downloads data for subject1 that has been mapped to fsaverage.
logical, whether you accept the FreeSurfer license for fsaverage, available at https://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferSoftwareLicense. Defaults to FALSE.
Named list. The list has entries: "available": vector of strings. The names of the files that are available in the local file cache. You can access them using get_optional_data_file(). "missing": vector of strings. The names of the files that this function was unable to retrieve.
The subject fsaverage3 is a downsampled (low mesh resolution) version of the standard fsaverage. If you never heard about fsaverage3, you do not need it. You will have to manually re-sample your data in FreeSurfer if you want to use it with fsaverage3.
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