pkgmaker: alphacol – R documentation

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alphacol

Colour utilities

alphacol adds an alpha value to a colour specification and convert to a hexadecimal colour string.

alphacol(col, alpha = FALSE)

`col`	vector of any of the three kinds of R color specifications, i.e., either a color name (as listed by `colors()`), a hexadecimal string of the form `"#rrggbb"` or `"#rrggbbaa"` (see `rgb`), or a positive integer `i` meaning `palette()[i]`.
`alpha`	logical value indicating whether the alpha channel (opacity) values should be returned.

# Alphas
alphacol('red') # do nothing
alphacol('red', 10)
alphacol('#aabbcc', 5)
alphacol(4, 5)

Development Utilities for R Packages

v0.32.2

GPL (>= 2)

Authors

Renaud Gaujoux [aut, cre]

Initial release

2020-10-20