vertexLookup: Vertex Lookup

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

Vertex Lookup

Description

Find the vertices closest one or more targets, potentially returning the values for the vertices from a data map.

Usage

vertexLookup(
  vertices,
  target,
  data_map = NULL,
  returns = c("index", "coordinates"),
  coerce = as.numeric
)

Arguments

vertices	A descendent of mesh3d, bic_obj, or matrix-like object with 3-columns, and 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.
data_map	Either NULL, a vector of data about each vertex, or a file containing such a vector spread over multiple lines
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.
coerce	A function to coerce the final results to a given type. Defaults to as.numeric, if set to NULL, no coersion is performed.

Value

If a data_map is specified: a vector, typically numeric, if coerce is set to NULL and data_map is a file, the results will be character. If coerce is null and data_map is a vector it will return the same type as data_map. If data_map is unspecified, it acts like closestVertex

Mouse-Imaging-Centre/RMINC documentation built on Feb. 24, 2025, 1:22 a.m.