https://github.com/cran/fields
Tip revision: 04279c16ce718b82025aae97f6fcd30ba3a8b1c5 authored by Doug Nychka on 05 September 2011, 20:18:33 UTC
version 6.6
version 6.6
Tip revision: 04279c1
image.plot.plt.R
# fields, Tools for spatial data
# Copyright 2004-2011, Institute for Mathematics Applied Geosciences
# University Corporation for Atmospheric Research
# Licensed under the GPL -- www.gpl.org/licenses/gpl.html
"image.plot.plt" <- function(x, add = FALSE, legend.shrink = 0.9,
legend.width = 1, horizontal = FALSE, legend.mar = NULL,
bigplot = NULL, smallplot = NULL, ...) {
old.par <- par(no.readonly = TRUE)
if (is.null(smallplot))
stick <- TRUE
else stick <- FALSE
if (is.null(legend.mar)) {
legend.mar <- ifelse(horizontal, 3.1, 5.1)
}
# compute how big a text character is
char.size <- ifelse(horizontal, par()$cin[2]/par()$din[2],
par()$cin[1]/par()$din[1])
# This is how much space to work with based on setting the margins in the
# high level par command to leave between strip and big plot
offset <- char.size * ifelse(horizontal, par()$mar[1], par()$mar[4])
# this is the width of the legned strip itself.
legend.width <- char.size * legend.width
# this is room for legend axis labels
legend.mar <- legend.mar * char.size
# smallplot is the plotting region for the legend.
if (is.null(smallplot)) {
smallplot <- old.par$plt
if (horizontal) {
smallplot[3] <- legend.mar
smallplot[4] <- legend.width + smallplot[3]
pr <- (smallplot[2] - smallplot[1]) * ((1 - legend.shrink)/2)
smallplot[1] <- smallplot[1] + pr
smallplot[2] <- smallplot[2] - pr
}
else {
smallplot[2] <- 1 - legend.mar
smallplot[1] <- smallplot[2] - legend.width
pr <- (smallplot[4] - smallplot[3]) * ((1 - legend.shrink)/2)
smallplot[4] <- smallplot[4] - pr
smallplot[3] <- smallplot[3] + pr
}
}
if (is.null(bigplot)) {
bigplot <- old.par$plt
if (!horizontal) {
bigplot[2] <- min(bigplot[2], smallplot[1] - offset)
}
else {
bottom.space <- old.par$mar[1] * char.size
bigplot[3] <- smallplot[4] + offset
}
}
if (stick & (!horizontal)) {
dp <- smallplot[2] - smallplot[1]
smallplot[1] <- min(bigplot[2] + offset, smallplot[1])
smallplot[2] <- smallplot[1] + dp
}
return(list(smallplot = smallplot, bigplot = bigplot))
}