HSV Color Specification
Usage
hsv(h=1, s=1, v=1, gamma=1)
Arguments
h,s,v
|
numeric vectors of values in the range
[0,1] for ``hue'', ``saturation'' and ``value''
to be combined to form a vector of colors. Values in shorter
arguments are recycled.
|
gamma
|
a ``gamma correction'', see ...
|
Value
This function creates a vector of ``colors'' corresponding to
the given values in HSV space. The values returned by hsv
can be used with a col= specification in graphics functions or in
par.See Also
rainbow, rgb, gray.Examples
hsv(.5,.5,.5)
## Look at gamma effect:
n <- 20; y <- -sin(3*pi*((1:n)-1/2)/n)
op <- par(mfrow=c(3,2),mar=rep(1.5,4))
for(gamma in c(.4, .6, .8, 1, 1.2, 1.5))
plot(y,axes=F,frame.plot=T,xlab="",ylab="",pch=21,cex=30,
bg = rainbow(n, start=.85, end=.1, gamma = gamma),
main = paste("Red tones; gamma=",format(gamma)))
par(op)