plotColorPalette: Plot a color palette

In recolorize: Color-Based Image Segmentation

Plot a color palette

Description

Plots a color palette as a single bar, optionally scaling each color to a vector of sizes.

Usage

plotColorPalette(centers, sizes = NULL, cex_text = 2, horiz = TRUE, ...)

Arguments

centers	Colors to plot in palette. Accepts either a character vector of hex codes or an n x 3 matrix (rows = colors, columns = channels). Assumes RGB in 0-1 range.
sizes	An optional numeric vector of sizes for scaling each color. If no sizes are provided, colors are plotted in equal proportions.
cex_text	Size of the numbers displayed on each color, relative to the default. Passed to graphics::barplot(). Text is only plotted if sizes = NULL. cex_text = 0 will remove numbering.
horiz	Logical. Should the palette be plotted vertically or horizontally?
...	Additional parameters passed to graphics::barplot().

Details

plotColorPalette does not reorder or convert colors between color spaces, so users working in other colorspaces should convert to RGB before plotting.

Value

No return value; plots a rectangular color palette.

Examples

# plot 10 random colors
rand_colors <- matrix(runif(30), ncol = 3)
plotColorPalette(rand_colors)

# plot 10 random colors with arbitrary sizes
sizes <- runif(10, max = 1000)
plotColorPalette(rand_colors, sizes = sizes)

# reorder to plot smallest to largest
size_order <- order(sizes)
plotColorPalette(rand_colors[size_order, ],
                 sizes[size_order])

# plot a vector of hex colors, turn off numbering
hex_colors <- rgb(rand_colors)
plotColorPalette(hex_colors, cex_text = 0)

recolorize documentation built on April 4, 2025, 3:07 a.m.