closestVertex: Find Closest Vertex

In Mouse-Imaging-Centre/RMINC: Statistical Tools for Medical Imaging NetCDF (MINC) Files

Find Closest Vertex

Description

Given a set of vertices (3-column matrix or data frame of x,y,z coordinates) determine the index or coordinates of the closest vertex to a given set of target vertices (either a 3 element vector, or x-y-z table like structure)

Usage

closestVertex(vertices, target, returns = c("index", "coordinates"))

Arguments

vertices	A matrix-like object with 3-columns, an n rows representing vertices
target	either a 3-element numeric vector representing x-y-z coordinates for a single target, or a matrix-like object as described above containing multiple targets.
returns	Whether to return the index of each match (one per target), or the coordinates of the matches, the later being useful when exact matches aren't expected.

Details

Vertices are matched to the target by finding the vertex with the minimum euclidean distance from the target.

Value

In most cases, a numeric vector of match results, in the case of multiple targets and returns = "coordinates" the output is a 3-column matrix of coordinates.

Mouse-Imaging-Centre/RMINC documentation built on Nov. 12, 2022, 1:50 p.m.