nearest.neighbours: Nearest neighbour structure for a data set
Description
This function can be used to generate nearest neighbour information
for a set of 2D data points.
Usage
nearest.neighbours(x, y)
Arguments
x
vector containing \(x\) ccordinates of points.
y
vector containing \(x\) ccordinates of points.
Value
A list with two components
index
A matrix with one row per data point. Each row contains the indices
of the nearest neigbours to the point associated with this row,
currently the point itself is also listed in the first row, so
this matrix is of dimension \(n\) times \(n\) (will change to
\(n\) times \(n-1\) later).
dist
A matrix containing the distances according to the neigbours listed
in component index.
Details
The C++ implementation of this function is used inside the
locpoly and interp functions.