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#
# fields is a package for analysis of spatial data written for
# the R software environment.
# Copyright (C) 2024 Colorado School of Mines
# 1500 Illinois St., Golden, CO 80401
# Contact: Douglas Nychka, douglasnychka@gmail.com,
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the R software environment if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# or see http://www.r-project.org/Licenses/GPL-2
##END HEADER
mKrigFastPredictSetup <- function(mKrigObject,
gridList,
NNSize=4,
giveWarnings=TRUE
) {
# the main reason to pass new args to the covariance is to increase
# the temp space size for sparse multiplications
# other optional arguments that typically describe the covariance function
# from mKrig are passed along in the list object$args
np<- NNSize
xObs<- mKrigObject$x
# adjust grid if needed to include a margin of np+1 grid points beyond xObs
marginInfo<- addMarginsGridList(xObs, gridList, np)
# these are the slightly larger grids by adding margins.
gridListNew<- marginInfo$gridListNew
offGridObject<- offGridWeights( xObs,
gridListNew,
mKrigObject = mKrigObject,
np=np,
giveWarnings = giveWarnings
)
cov.obj<- stationary.image.cov( setup=TRUE,
grid=gridListNew,
cov.function=mKrigObject$cov.function.name,
cov.args= mKrigObject$args)
return(
list(offGridObject = offGridObject,
cov.obj = cov.obj,
marginInfo = marginInfo
)
)
}
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