r-loo: new package at 2.1.0 (#11448)

var/spack/repos/builtin/packages/r-loo/package.py

+# 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 RLoo(RPackage):
+    """loo: Efficient Leave-One-Out Cross-Validation and WAIC for
+       BayesianModels"""
+
+    homepage = "https://mc-stan.org/loo"
+    url      = "https://cran.r-project.org/src/contrib/loo_2.1.0.tar.gz"
+    list_url = "https://cran.r-project.org/src/contrib/Archive/loo"
+
+    version('2.1.0', sha256='1bf4a1ef85d151577ff96d4cf2a29c9ef24370b0b1eb08c70dcf45884350e87d')
+
+    depends_on('r@3.1.2:', type=('build', 'run'))
+    depends_on('r-checkmate', type=('build', 'run'))
+    depends_on('r-matrixstats@0.52:', type=('build', 'run'))