fill_alpha: Modify fill transparency
In ggplot2: Create Elegant Data Visualisations Using the Grammar of Graphics

fill_alpha

R Documentation

Modify fill transparency

Description

This works much like alpha() in that it modifies the transparency of fill colours. It differs in that fill_alpha() also attempts to set the transparency of ⁠<GridPattern>⁠ objects.

Usage

fill_alpha(fill, alpha)

Arguments

`fill`	A fill colour given as a `character` or `integer` vector, or as a (list of) `⁠<GridPattern>⁠` object(s).
`alpha`	A transparency value between 0 (transparent) and 1 (opaque), parallel to `fill`.

Value

A character vector of colours, or list of ⁠<GridPattern>⁠ objects.

Examples

# Typical colour input
fill_alpha("red", 0.5)

if (utils::packageVersion("grid") > "4.2") {
  # Pattern input
  fill_alpha(list(grid::linearGradient()), 0.5)
}

ggplot2 documentation built on June 22, 2024, 11:35 a.m.