knn_lookup_rows: Nearest neighbour rows

In rossklin/flanner: Approximate nearest neighbours queries

Description

Lookup row numbers of nearest neighbours in a data.frame.

Usage

knn_lookup_rows(df, points, k, ignore.colnames = FALSE,
  square.distance = TRUE, ...)

Arguments

df	data.frame, preferably indexed using flanner, in which to look for neighbours
points	data.frame containing coordinates to lookup neighbours of
k	number of neighbours to find
ignore.colnames	whether to interpret points by column numbers of column names (defaults to the latter)
square.distance	whether to return distances squared (default, which is faster)

Details

the returned row number vector has a "distance" attribute containing the (possibly squared) euclidean (L^2) distances.

rossklin/flanner documentation built on May 27, 2019, 11:39 p.m.