Michael,
Although this is a rather old post I'm responding to, I recently came across
it and have a suggestions for getting rid of the legend. Simply modify the
code associated with the function and stuff it into a new function,
edm<-function (x = seq(0, 1, length.out = nrow(z)), y = seq(0, 1,
length.out = ncol(z)), z, xlim = range(x, finite = TRUE),
ylim = range(y, finite = TRUE), zlim = range(z, finite = TRUE),
levels = pretty(zlim, nlevels), nlevels = 20, color.palette = cm.colors,
col = color.palette(length(levels) - 1), plot.title, plot.axes,
key.title, key.axes, asp = NA, xaxs = "i", yaxs = "i", las = 1,
axes = TRUE, frame.plot = axes, ...)
{
if (missing(z)) {
if (!missing(x)) {
if (is.list(x)) {
z <- x$z
y <- x$y
x <- x$x
}
else {
z <- x
x <- seq.int(0, 1, length.out = nrow(z))
}
}
else stop("no 'z' matrix specified")
}
else if (is.list(x)) {
y <- x$y
x <- x$x
}
if (any(diff(x) <= 0) || any(diff(y) <= 0))
stop("increasing 'x' and 'y' values expected")
mar.orig <- (par.orig <- par(c("mar", "las", "mfrow")))$mar
on.exit(par(par.orig))
w <- (3 + mar.orig[2L]) * par("csi") * 2.54
#layout(matrix(c(2, 1), ncol = 2L), widths = c(1, lcm(w)))
par(las = las)
mar <- mar.orig
mar[4L] <- mar[2L]
mar[2L] <- 1
par(mar = mar)
# plot.new()
# plot.window(xlim = c(0, 1), ylim = range(levels), xaxs = "i",
# yaxs = "i")
# rect(0, levels[-length(levels)], 1, levels[-1L], col = col)
# if (missing(key.axes)) {
# if (axes)
# axis(4)
# }
# else key.axes
# box()
# if (!missing(key.title))
# key.title
# mar <- mar.orig
# mar[4L] <- 1
# par(mar = mar)
plot.new()
plot.window(xlim, ylim, "", xaxs = xaxs, yaxs = yaxs, asp = asp)
if (!is.matrix(z) || nrow(z) <= 1L || ncol(z) <= 1L)
stop("no proper 'z' matrix specified")
if (!is.double(z))
storage.mode(z) <- "double"
.Internal(filledcontour(as.double(x), as.double(y), z,
as.double(levels),
col = col))
if (missing(plot.axes)) {
if (axes) {
title(main = "", xlab = "", ylab = "")
Axis(x, side = 1)
Axis(y, side = 2)
}
}
else plot.axes
if (frame.plot)
box()
if (missing(plot.title))
title(...)
else plot.title
invisible()
}
Then call this new function,
edm(x, y, z, axes = F, frame.plot = F, asp = 1,
col = palette(gray(seq(0, 0.9, len = 25))), nlevels = 25)
Eric
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