vdata.split.by.hemi: Split morph data vector at hemisphere boundary.

In dfsp-spirit/nitools: Managing and Visualizing Brain Surface Data

Split morph data vector at hemisphere boundary.

Description

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.

dfsp-spirit/nitools documentation built on Jan. 26, 2024, 8:24 p.m.