change_alpha: change (or add) alpha to colors

In williamcioffi/chf: c_ioffi h_elper f_unctions

change (or add) alpha to colors

Description

change (or add) alpha to colors

Usage

change_alpha(col, alpha)

Arguments

col	color or vector of colors
alpha	value to add or change. on [0, 1].

Value

rgb colors or vector of rgbcolors with alpha

Examples

# numeric
change_alpha(1, .5)

# rgb
change_alpha(rgb(1, 0, 1), .5)
change_alpha("#ff00ff", .5)

# multiple
change_alpha(1:3, alpha = 0.5)
change_alpha(1:3, alpha = c(0.1, 0.2, 0.3))

williamcioffi/chf documentation built on June 14, 2025, 10:05 p.m.