EpiModel (version 0.95)

brewer.ramp: RColorBrewer Color Ramp for EpiModel Plots

Description

This function returns vector of colors consistent with a high-brightness set of colors from an RColorBrewer palette.

Usage

brewer.ramp(n, plt, delete.lights = TRUE)

Arguments

plt

RColorBrewer palette from brewer.pal

n

number of colors to return

delete.lights

delete the lightest colors from the color palette, helps with plotting in many high-contrast palettes

Value

• A vector of length equal to n with a range of color values consistent with an RColorBrewer color palette.

Details

RColorBrewer provides easy access to helpful color palettes, but the built-in palettes are limited to the set of colors in the existing palette. This function expands the palette size to any number of colors by filling in the gaps. Also, colors within the "div" and "seq" set of palettes whose colors are very light (close to white) are deleted by default for better visualization of plots.

See Also

RColorBrewer

Examples

# Shows a 100-color ramp for 4 RColorBrewer palettes
par(mfrow=c(2,2), mar=c(1,1,2,1))
pals <- c("Spectral", "Greys", "Blues", "Set1")
for (i in 1:length(pals)) {
 plot(1:100, 1:100, type="n", axes=FALSE, main=pals[i])
 abline(v=1:100, lwd=6, col=brewer.ramp(100, pals[i]))
}