col2rgb
Interpret Color Names, Strings, and Numbers
Description
Converts color names, color strings of the form "#RRGGBB",
and indices into the current palette of red/green/blue values.
Usage
col2rgb(col, alpha = FALSE)
Arguments
| col |
a vector of character strings or of small positive integers.
- The character strings should be either one of the names in
the output of colors(), or strings of the form "0xRRGGBB"
or "0xRRGGBBAA", giving the two-digit hexadecimal values (range 00-FF,
equivalent to 0-255 decimal) of the red, green, blue, and possible
alpha (opacity) values for the colors.
- The integers should be indices into the list of colors listed
in the output of palette().
|
| alpha |
A logical value. If TRUE, the alpha (opacity) channel is returned.
The default is FALSE.
|
Value
returns a three (or four, if alpha is TRUE) row matrix giving
the red, green, blue, and possible alpha components of the input colors.
The values are on a scale of 0 to 255.
See Also
Examples
col2rgb(c("red", "#10fe60"))
col2rgb(c("yellow", "#f0fe608f"), alpha=TRUE)