R color to RGB (red/green/blue) conversion.
vector of any of the three kind of R colors, i.e., either a color name (an element of
logical value indicating whether alpha channel (opacity) values should be returned.
This is merely a wrapper to
col2rgb, defined in order to follow this package's naming conventions.
A matrix with a column for each color. The three rows of the matrix indicate red, green and blue value and are named "red", "green", and "blue" accordingly. The matrix might have a 4th row if an alpha channel is requested.
Andri Signorell <email@example.com>
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