# Copyright 2013-2023 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.package import *


class RAls(RPackage):
    """Multivariate Curve Resolution Alternating Least Squares (MCR-ALS).

    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."""

    cran = "ALS"

    version("0.0.7", sha256="57a195e8c5a3d856cd543c99ae532cc25c83b3b444f513b74447bf4a72378da0")
    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"))