sequential_gradient: Control parameters of the sequential colorscale

In thematic: Unified and Automatic 'Theming' of 'ggplot2', 'lattice', and 'base' R Graphics

Control parameters of the sequential colorscale

Description

Controls the default weighting and direction of the color gradient derived from the fg, bg, and accent color (defined in thematic_on()).

Usage

sequential_gradient(fg_weight = 0.9, bg_weight = 0, fg_low = TRUE, n = 30)

Arguments

fg_weight	a number (between 0 and 1) defining much of the fg color should be mixed into the colorscale.
bg_weight	a number (between 0 and 1) defining much of the bg color should be mixed into the colorscale.
fg_low	if TRUE (the default), the fg color is used for the low end of the colorscale (rather than the high end).
n	number of color codes.

Value

a list of options for passing to the sequential argument of thematic_on().

Examples

# Gradient from fg to accent
fg <- sequential_gradient(1, 0)
thematic_on("black", "white", "salmon", sequential = fg)
ggplot2::qplot(1:10, 1:10, color = 1:10)

# Gradient from accent -> bg
bg <- sequential_gradient(0, 1)
thematic_on("black", "white", "salmon", sequential = bg)
ggplot2::qplot(1:10, 1:10, color = 1:10)

# Gradient from mix(accent, fg, 0.5) -> mix(accent, bg, 0.5)
mix <- sequential_gradient(0.5, 0.5)
thematic_on("black", "white", "salmon", sequential = mix)
ggplot2::qplot(1:10, 1:10, color = 1:10)

# Use fg (instead of bg) for high end of scale
mix_flip <- sequential_gradient(0.5, 0.5, fg_low = FALSE)
thematic_on("black", "white", "salmon", sequential = mix_flip)
ggplot2::qplot(1:10, 1:10, color = 1:10)

thematic documentation built on Sept. 11, 2024, 7:45 p.m.