plot.spatialProcess.R
# fields is a package for analysis of spatial data written for
# the R software environment .
# Copyright (C) 2017
# University Corporation for Atmospheric Research (UCAR)
# Contact: Douglas Nychka, nychka@ucar.edu,
# National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80307-3000
#
# 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
"plot.spatialProcess" <- function(x, digits = 4, which = 1:4,
...) {
out <- x
#
# don't do plots 2:4 if a fixed lambda
#
fitted.values <- predict(out)
std.residuals <- (out$residuals * sqrt(out$weights))/out$sigma.MLE
if (any(which == 1)) {
#temp <- summary(out)
plot(fitted.values, out$y, ylab = "Y", xlab = " predicted values",
bty = "n", ...)
abline(0, 1)
hold <- par("usr")
title("Observations by predicted values")
}
if (any(which == 2)) {
plot(fitted.values, std.residuals, ylab = "(STD) residuals",
xlab = " predicted values", bty = "n", ...)
yline(0)
}
if (any(which == 3)) {
mar.old<- par()$mar
summary<- out$MLEInfo$MLEProfileLambda$summary
# referring to summary[,2] is fragile -- can be either full or REML
par( mar= mar.old + c(0,0,0,2) )
plot(summary[,"EffDf" ], summary[,"GCV" ], xlab = "Eff. number of parameters",
ylab = "GCV function", type="l",
...)
xline( summary[which.min(summary[,"GCV" ] ),"EffDf"])
usr.save <- par()$usr
usr.save[3:4]<- range( summary[,2 ] )
par( usr= usr.save, ylog=FALSE)
lines(summary[,"EffDf" ], summary[,2 ],
lty=2, lwd=2, col="blue")
xline( summary[which.max(summary[,2 ] ),"EffDf"],
col="blue")
axis( side=4)
mtext( side=4, line=2, "log Profile Likelihood(lamdba)",cex=.75,
col="blue")
title("Profile over lambda",
cex = 0.6)
box()
par( mar=mar.old)
}
if (any(which == 4)) {
summary<- out$MLEInfo$MLEGrid$summary
thetaGrid<- (out$MLEInfo$MLEGrid$par.grid)$theta
plot(thetaGrid,summary[,2], pch=16, xlab="theta (range parameter)", ylab="log Profile Likelihood (theta)")
title("Profile likelihood for theta \n (range parameter)")
xline( out$theta.MLE, lwd=2, col="grey")
lines( splint(thetaGrid,summary[,2], nx=200), lwd=2, col="red")
}
}