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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
"colorbar.plot" <- function(x, y, strip, strip.width = 0.1,
strip.length = 4 * strip.width, zrange = NULL, adj.x = 0.5,
adj.y = 0.5, col = tim.colors(256), horizontal = TRUE, ...) {
# coerce to be one column matrix if it is a vector
if (!is.matrix(strip)) {
strip <- matrix(c(strip), ncol = 1)
}
m <- nrow(strip)
n <- ncol(strip)
# find common range across strips if not specified
if (is.null(zrange)) {
zrange <- matrix(range(c(strip), na.rm = TRUE), nrow = n,
ncol = 2, byrow = TRUE)
}
# see help( par) for background on graphical settings
ucord <- par()$usr
pin <- par()$pin
if (horizontal) {
dy <- strip.width * (ucord[4] - ucord[3])
dx <- strip.length * pin[2] * (ucord[2] - ucord[1])/(pin[1])
}
else {
dx <- strip.width * (ucord[2] - ucord[1])
dy <- strip.length * pin[1] * (ucord[4] - ucord[3])/(pin[2])
}
#
# dx and dy should have the correct ratio given different different scales
# and also different aspects to the plot window
#
n <- ncol(strip)
m <- nrow(strip)
# create grids in x and y for strip(s) based on the users
# coordinates of the plot and th positioning argument (adj)
if (horizontal) {
xs <- seq(0, dx, , m + 1) + x - adj.x * dx
ys <- seq(0, dy, , n + 1) + y - adj.y * dy
}
else {
xs <- seq(0, dx, , n + 1) + x - adj.x * dx
ys <- seq(0, dy, , m + 1) + y - adj.y * dy
}
#
# plot image row by row to allow for different zlim's
# see image.add for a fields function that just plots the whole image at
# once.
for (k in 1:n) {
if (horizontal) {
image(xs, c(ys[k], ys[k + 1]), cbind(strip[, k]),
zlim = zrange[k, ], add = TRUE, col = col, ...)
}
else {
image(c(xs[k], xs[k + 1]), ys, rbind(strip[, k]),
zlim = zrange[k, ], add = TRUE, col = col, ...)
}
}
}
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