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Create a Region on Surface

Source: R/ROI.R
SurfaceDisk.Rd

Creates a Region on a Surface from a radius and surface

Usage

SurfaceDisk(surf, index, radius, max_order = NULL)

Arguments

surf

a SurfaceGeometry or BrainSurface or BrainSurfaceVector

index

the index of the central surface node. Must be a numeric integer value within 1:length(V(surf@graph)).

radius

the size in mm of the geodesic radius. Must be a single positive numeric value.

max_order

maximum number of edges to traverse. default is computed based on average edge length.

Value

An ROISurfaceVector if surf is a BrainSurface or BrainSurfaceVector, otherwise an ROISurface containing the vertices within the specified geodesic radius.

Details

The igraph associated with surf must have an edge attribute named dist containing numeric weights with no NA values.