| rgb {graphics} | R Documentation |
This function creates “colors” corresponding to the given
intensities (between 0 and max) of the red, green and blue
primaries. The names argument may be used to provide names for the
colors.
The values returned by rgb can be used with a
col= specification in graphics functions or in par.
rgb(red, green, blue, names=NULL, maxColorValue = 1)
red, blue, green |
vectors of same length with values in [0, M]
where M is maxColorValue. When this is 255, the
red, blue and green values are coerced to
integers in 0:255 and the result is computed most efficiently. |
names |
character. The names for the resulting vector. |
maxColorValue |
number giving the maximum of the color values range, see above. |
col2rgb the “inverse” for translating R colors
to RGB vectors;
rainbow, hsv, gray.
rgb(0,1,0)
(u01 <- seq(0,1, length=11))
stopifnot(rgb(u01,u01,u01) == gray(u01))
reds <- rgb((0:15)/15, g=0,b=0, names=paste("red",0:15,sep="."))
reds
rgb(0, 0:12, 0, max = 255)# integer input