rich.colors: Rich Color Palettes

In gplots: Various R Programming Tools for Plotting Data

Rich Color Palettes

Description

Create a vector of n colors that are perceptually equidistant and in an order that is easy to interpret.

Usage

rich.colors(n, palette="temperature", alpha=1.0, rgb=FALSE, plot=FALSE)

Arguments

n	number of colors to generate.
palette	palette to use: "temperature" contains blue-green-yellow-red, and "blues" contains black-blue-white.
alpha	alpha transparency, from 0 (fully transparent) to 1 (opaque).
rgb	if TRUE then a matrix of RGBA values is included as an attribute.
plot	whether to plot a descriptive color diagram.

Value

A character vector of color codes.

Author(s)

Arni Magnusson.

See Also

rgb, rainbow, heat.colors.

Examples

m <- abs(matrix(1:120+rnorm(120), nrow=15, ncol=8))
opar <- par(bg="gray", mfrow=c(1,2))
matplot(m, type="l", lty=1, lwd=3, col=rich.colors(8))
matplot(m, type="l", lty=1, lwd=3, col=rich.colors(8,"blues"))
par(opar)

barplot(rep(1,100), col=rich.colors(100), space=0, border=0, axes=FALSE)
barplot(rep(1,20), col=rich.colors(40)[11:30]) # choose subset

plot(m, rev(m), ylim=c(120,0), pch=16, cex=2,
     col=rich.colors(200,"blues",alpha=0.6)[1:120]) # semitransparent

rich.colors(100, plot=TRUE)  # describe rgb recipe

par(mfrow=c(2,2))
barplot(m, col=heat.colors(15), main="\nheat.colors")
barplot(m, col=1:15, main="\ndefault palette")
barplot(m, col=rich.colors(15), main="\nrich.colors")
barplot(m, col=rainbow(15), main="\nrainbow")
par(opar)

gplots documentation built on Oct. 6, 2024, 1:07 a.m.