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+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class RRann(RPackage):
+ """Finds the k nearest neighbours for every point in a given dataset in O(N
+ log N) time using Arya and Mount's ANN library (v1.1.3). There is support
+ for approximate as well as exact searches, fixed radius searches and 'bd'
+ as well as 'kd' trees. The distance is computed using the L2 (Euclidean)
+ metric. Please see package 'RANN.L1' for the same functionality using the
+ L1 (Manhattan, taxicab) metric."""
+
+ homepage = "https://github.com/jefferis/RANN"
+ url = "https://cloud.r-project.org/src/contrib/RANN_2.6.1.tar.gz"
+ list_url = "https://cloud.r-project.org/src/contrib/Archive/RANN"
+
+ version('2.6.1', sha256='b299c3dfb7be17aa41e66eff5674fddd2992fb6dd3b10bc59ffbf0c401697182')