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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 RAls(RPackage):
"""Alternating least squares is often used to resolve components
contributing to data with a bilinear structure; the basic
technique may be extended to alternating constrained least squares.
Commonly applied constraints include unimodality, non-negativity,
and normalization of components. Several data matrices may be
decomposed simultaneously by assuming that one of the two matrices
in the bilinear decomposition is shared between datasets."""
homepage = "https://cloud.r-project.org/package=ALS"
url = "https://cloud.r-project.org/src/contrib/ALS_0.0.6.tar.gz"
list_url = "https://cloud.r-project.org/src/contrib/Archive/ALS"
version('0.0.6', sha256='ca90d27115ae9e476967f521bf6935723e410a3bf92477e7570e14bfd3b099eb')
depends_on('r@2.10:', type=('build', 'run'))
depends_on('r-iso', type=('build', 'run'))
depends_on('r-nnls@1.1:', type=('build', 'run'))
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