Split morph data vector at hemisphere boundary. — vdata.split.by.hemi • fsbrain

Given a single vector of per-vertex data for a mesh, split it at the hemi boundary. This is achieved by loading the respective surface and checking the number of vertices for the 2 hemispheres.

Usage

vdata.split.by.hemi(
  subjects_dir,
  subject_id,
  vdata,
  surface = "white",
  expand = TRUE
)

Arguments

subjects_dir: 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.
subject_id: string. The subject identifier
vdata: numerical vector of data for both hemispheres, one value per vertex
surface: the surface to load to determine the vertex counts
expand: logical, whether to allow input of length 1, and expand (repeat) it to the length of the hemispheres.

Value

a hemilist, each entry contains the data part of the respective hemisphere.

Note

Instead of calling this function to split the data, you could use the 'split_by_hemi' parameter of subject.morph.native.