Determine vertex counts for the brain meshes of a subject.
subject.num.verts(
subjects_dir,
subject_id,
surface = "white",
hemi = "both",
do_sum = FALSE
)string. The FreeSurfer SUBJECTS_DIR, i.e., a directory containing the data for all your subjects, each in a subdir named after the subject identifier.
string. The subject identifier
string. The surface name. E.g., "white", or "pial". Used to construct the name of the surface file to be loaded.
string, one of 'lh', 'rh', or 'both'. The hemisphere name. Used to construct the names of the surface file to be loaded. For 'both', see the information on the return value.
logical, whether to return the sum of the vertex counts for lh and rh. Ignored unless 'hemi' is 'both'. If set, a single scalar will be returned.
integer of hemilist of integers, the vertex count. If hemi is 'both' and 'do_sum' is `FALSE`, a hemilist of integers is returned. Otherwise, a single integer.