setAlpha: setAlpha

In ram6ler/transparent: Set the Transparency of Regular R Colours and Draw Basic Shapes

Description

Set the alpha level of a standard R colour.

Usage

setAlpha(col, alpha)

Arguments

col	A character specifying a standard R colour
alpha	A numeric in [0, 1] specifying the alpha level

Value

A character vector with elements of 7 or 9 characters, "#" followed by the red, blue, green and optionally alpha values in hexadecimal (after rescaling to 0 ... 255).

Examples

plot(
  rnorm(10000),
  rnorm(10000),
  pch = 16,
  col = setAlpha("slateblue", 0.2)
)

ram6ler/transparent documentation built on May 26, 2019, 10:03 p.m.