FSA (version 0.8.6)

col2rgbt: Converts an R color to RGB (red/green/blue) including a transparency (alpha channel).

Description

Converts an R color to RGB (red/green/blue) including a transparency (alpha channel). Similar to col2rgb except that a transparncy (alpha channel) can be included.

Usage

col2rgbt(col, transp = 1)

Arguments

col

A 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

transp

A numeric vector that indicates the transparency level for the color. The transpaency values must be greater than 0. Transparency values greater than 1 are interpreted as the number of points plotted on top of each other before the transparency is lost

Value

• A vector of hexadecimal strings of the form "#rrggbbaa" as would be returned by rgb.

See Also

See col2rgb for similar functionality.

Examples

col2rgbt("black")
col2rgbt("black",1/4)
clrs <- c("black","blue","red","green")
col2rgbt(clrs)
col2rgbt(clrs,1/4)
trans <- (1:4)/5
col2rgbt(clrs,trans)