#' Wrapper for libnabo K Nearest Neighbours C++ library
#'
#' R package \bold{nabor} wraps the
#' \href{https://github.com/ethz-asl/libnabo}{libnabo} library, a fast K Nearest
#' Neighbour library for low-dimensional spaces written in templated C++. The
#' package provides both a standalone function (see \code{\link{knn}} for basic
#' queries along an option to produce an object containing the k-d tree search
#' (see \code{\link{WKNN}}) structure when making multiple queries against the
#' same target points.
#'
#' libnabo uses the same approach as the ANN library (wrapped in R package
#' \code{RANN}) but is generally faster and with a smaller memory footprint.
#' Furthermore since it is templated on the underlying scalar type for
#' coordinates (among other things), we have provided both float and double
#' coordinate implementations of the classes wrapping the search tree
#' structures. See the github repository and Elsenberg et al paper below for
#' details.
#' @name nabor-package
#' @aliases nabor
#' @useDynLib nabor
#' @import Rcpp methods
#' @references Elseberg J, Magnenat S, Siegwart R and Nuechter A (2012).
#' "Comparison of nearest-neighbor-search strategies and implementations for
#' efficient shape registration." _Journal of Software Engineering for
#' Robotics (JOSER)_, *3*(1), pp. 2-12. ISSN 2035-3928.
#' @seealso \code{\link{knn}}, \code{\link{WKNN}}
NULL
#' List of 3 matrices containing 3D points from Drosophila neurons
#'
#' This R list contains 3 skeletonized \emph{Drosophila} Kenyon cells as
#' \code{dotprops} objects. Original data is due to Chiang et al. 2011, who have
#' generously shared their raw data at \url{http://flycircuit.tw}. Image
#' registration and further processing was carried out by Greg Jefferis.
#' @name kcpoints
#' @docType data
#' @references [1] Chiang A.S., Lin C.Y., Chuang C.C., Chang H.M., Hsieh C.H.,
#' Yeh C.W., Shih C.T., Wu J.J., Wang G.T., Chen Y.C., Wu C.C., Chen G.Y.,
#' Ching Y.T., Lee P.C., Lin C.Y., Lin H.H., Wu C.C., Hsu H.W., Huang Y.A.,
#' Chen J.Y., et al. (2011). Three-dimensional reconstruction of brain-wide
#' wiring networks in Drosophila at single-cell resolution. Curr Biol 21 (1),
#' 1--11.
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