annot_neighbors: Compute adjacency matrix of surface parcellation (annot)...

In dfsp-spirit/brainloc: Find Region Names and Coordinates for a Point on the Human Brain

Description

Given a brain surface and a parcellation into regions, find out which regions are adjacent to each other. A region i is adjacent to another region j if an edge connects any vertex of i with any vertex of i.

Usage

annot_neighbors(annot_min, surface, empty_rename = "_")

Arguments

annot_min	a full fs.annot instance, or a minimal annot, i.e., only the 'label_names' field of the annot. Only a single one, not a hemilist.
surface	fs.surface instance, the brain mesh (for a single hemisphere).
empty_rename	optional character string, the name to use for unnamed regions (which have an empty string as region name).

Value

named integer matrix of regions, expressing whether they are direct neighbors (value 1L) or not (value 0L).

Note

Regions from different hemispheres cannot be direct neighbors.

This works on a single hemisphere. We should create a wrapper that works on brainparc instances.

dfsp-spirit/brainloc documentation built on Jan. 28, 2022, 12:25 p.m.