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#
# fields is a package for analysis of spatial data written for
# the R software environment.
# Copyright (C) 2022 Colorado School of Mines
# 1500 Illinois St., Golden, CO 80401
# Contact: Douglas Nychka, douglasnychka@gmail.edu,
#
# 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
"summaryGCV.Krig" <- function(object, lambda, cost = 1,
verbose = FALSE, offset = 0, y = NULL, ...) {
out <- object
nt <- out$nt
np <- out$np
N <- out$N
D <- out$matrices$D
if (is.null(y)) {
u <- out$matrices$u
tauHat.pure.error <- out$tauHat.pure.error
pure.ss <- out$pure.ss
}
else {
out2 <- Krig.coef(out, y)
u <- out2$u
tauHat.pure.error <- out2$tauHat.pure.error
pure.ss <- out2$pure.ss
}
info <- list(matrices = list(D = D, u = u), N = N, nt = nt,
cost = cost, pure.ss = pure.ss, tauHat.pure.error = tauHat.pure.error,
offset = offset)
if (verbose) {
print(info)
}
lambda.est <- rep(NA, 6)
names(lambda.est) <- c("lambda", "trA", "GCV", "GCV.one",
"GCV.model", "tauHat")
lambda.est[1] <- lambda
lambda.est[2] <- Krig.ftrace(lambda, D)
lambda.est[3] <- Krig.fgcv(lambda, info)
lambda.est[4] <- Krig.fgcv.one(lambda, info)
if (!is.na(tauHat.pure.error)) {
lambda.est[5] <- Krig.fgcv.model(lambda, info)
}
lambda.est[6] <- sqrt(Krig.fs2hat(lambda, info))
lambda.est
}
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