Parcel-to-parcel geodesic distances — parcel_geodesic_distance_matrix • neurosurf

Parcel-to-parcel geodesic distances

Usage

parcel_geodesic_distance_matrix(
  labeled_surface,
  metric = c("centroid", "min"),
  component_policy = c("error", "largest", "each", "merge"),
  weights = NULL,
  chunk_size = 2000,
  cache = TRUE
)

Arguments

labeled_surface: A LabeledNeuroSurface.
metric: "centroid" (distance between parcel medoids) or "min" (minimum distance between any vertices of two parcels).
component_policy: Fragment handling policy.
weights: Optional numeric edge weights (defaults to E(g)$dist).
chunk_size: Number of source vertices per Dijkstra batch.
cache: Logical; cache symmetric results when targets is NULL or identical to vertices.

Value

A numeric matrix with parcel-unit names as dimnames.

Examples

# \donttest{
# Requires a LabeledNeuroSurface
# lsurf <- read_freesurfer_annot("lh.aparc.annot", geom)
# dmat <- parcel_geodesic_distance_matrix(lsurf)
# }