Colour palette generator factory

Returns a function function(n) that selects n colours from the named palette. This factory is used internally by scale_colour_stem() and scale_fill_stem() to satisfy ggplot2's discrete scale interface, but can also be called directly.

Diverging palettes use select_diverging() to pick colours that preserve the symmetric structure of the palette. All other palette types return the first n colours, optionally reversed.

Usage

stem_palette_gen(palette = "div1", direction = 1)

Arguments

palette

Name of the palette. See stem_palette() for the full list of valid names.

direction

1 (default) returns colours in their natural order; -1 reverses the order.

Value

A function(n) that returns a character vector of n hex colour codes.

See also

stem_palette(), select_diverging(), scale_colour_stem()

Examples

# Create a generator then call it for 3 colours
gen <- stem_palette_gen("modern")
gen(3)
#> [1] "#35978F" "#B0C89F" "#BF812D"

# Reversed order
stem_palette_gen("div1", direction = -1)(5)
#> [1] "#FC684D" "#FDA592" "#D1C9BC" "#8CD2CC" "#4DA8A0"