Color to Grayscale

Convert a color to grayscale

Usage

col2grayscale(x, what = c("color", "decimal"))

Arguments

x

Color to convert to grayscale

what

Character: "color" returns a hexadecimal color, "decimal" returns a decimal between 0 and 1

Details

Uses the NTSC grayscale conversion: 0.299 * R + 0.587 * G + 0.114 * B

Author

EDG

Examples

if (FALSE) { # \dontrun{
col2grayscale("red")
col2grayscale("red", "dec")
} # }