hex2pal <- function (hex, n, type = c("discrete", "continuous")) {
type <- match.arg(type)
pal <- hex
if (is.null(pal))
stop("Palette not found.")
if (missing(n)) {
n <- length(pal)
}
if (type == "discrete" && n > length(pal)) {
stop("Number of requested colors greater than what palette can offer")
}
out <- switch(type, continuous = colorRampPalette(pal)(n),
discrete = pal[1:n])
structure(out, class = "palette", name = deparse(substitute(hex)))
}
print.palette <- function(x, ...) {
n <- length(x)
old <- par(mar = c(0.5, 0.5, 0.5, 0.5))
on.exit(par(old))
image(1:n, 1, as.matrix(1:n), col = x,
ylab = "", xaxt = "n", yaxt = "n", bty = "n")
rect(0, 0.9, n + 1, 1.1, col = rgb(1, 1, 1, 0.8), border = NA)
text((n + 1) / 2, 1, labels = attr(x, "name"), cex = 3, family = "serif")
}
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