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# 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 RFields(RPackage):
"""Tools for Spatial Data.
For curve, surface and function fitting with an emphasis; on splines,
spatial data, geostatistics, and spatial statistics. The major methods;
include cubic, and thin plate splines, Kriging, and compactly supported;
covariance functions for large data sets. The splines and Kriging methods
are; supported by functions that can determine the smoothing parameter;
(nugget and sill variance) and other covariance function parameters by
cross; validation and also by restricted maximum likelihood. For Kriging;
there is an easy to use function that also estimates the correlation; scale
(range parameter). A major feature is that any covariance function;
implemented in R and following a simple format can be used for; spatial
prediction. There are also many useful functions for plotting; and working
with spatial data as images. This package also contains; an implementation
of sparse matrix methods for large spatial data; sets and currently
requires the sparse matrix (spam) package. Use; help(fields) to get started
and for an overview. The fields source; code is deliberately commented and
provides useful explanations of; numerical details as a companion to the
manual pages. The commented; source code can be viewed by expanding the
source code version; and looking in the R subdirectory. The reference for
fields can be generated; by the citation function in R and has DOI
<doi:10.5065/D6W957CT>. Development; of this package was supported in part
by the National Science Foundation Grant; 1417857, the National Center
for Atmospheric Research, and Colorado School of Mines.; See the Fields
URL; for a vignette on using this package and some background on spatial
statistics."""
cran = "fields"
license("GPL-2.0-or-later")
version("14.1", sha256="57c4c5592443d2ee869014b3199989b5edd1aff52e24f1cd313b8f9b34a95434")
version("13.3", sha256="c652838b1ae7eb368831522824bfbc1d1db7b9d1db5e9bb52b194098549944c3")
version("11.6", sha256="8600d1d992c40668cc2ab01b3c17d0e1bd44a001ec7ba9f468bc0e9ef87c59db")
version("9.9", sha256="262f03c630773b580c7162ab2a031c894ca489fd83989fd8a2f67573306e78e1")
depends_on("r@3.0:", type=("build", "run"))
depends_on("r@3.5.0:", type=("build", "run"), when="@14.1:")
depends_on("r-spam", type=("build", "run"))
depends_on("r-viridis", type=("build", "run"), when="@13.3:")
depends_on("r-maps", type=("build", "run"))
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