Assign Observations to Tessellation Cells

For a given tessellation, this function identifies which cell (centre) each observation belongs to based on nearest neighbour classification.

Usage

cellIndices(x, tess, dim, metric = "E", members)

Arguments

x

A numeric matrix of covariates where each row is an observation.

tess

A numeric matrix representing the tessellation centres, where each row is a unique centre.

dim

An integer vector specifying the column indices of x to be used for calculating distance.

metric

Either "Euclidean" or "Spherical".

members

A vector indicating covariate membership.

Value

A numeric vector of integers where each element corresponds to a row in x and its value is the row index of the nearest centre in tess.

Details

It finds the closest tessellation centre for each observation (row) in the covariate matrix, considering only the specified dimensions. This is achieved using the k-nearest neighbour algorithm where k=1.