rainbow(n, s=1, v=1, start=0, end=(n-1)/n) heat.colors(n) terrain.colors(n) topo.colors(n)
n
| the number of colors to be in the palette. |
s,v
| the ``saturation'' and ``value'' to be used to complete the HSV color descriptions. |
start
| the (corrected) hue at which the rainbow begins. |
end
| the (corrected) hue at which the rainbow ends. |
n
colors.
Equispaced hues in RGB space tend to cluster at
the red, green and blue primaries.
Some applications such as contouring require a pallette
of colors which do not ``wrap around'' to give a final
color close to the starting one.
The parameters start
and end
can be used
to specify particular subranges of hues.
The following values can be used when generating
such a subrange:
red=0, yellow=1/6, green=2/6, cyan=3/6, blue=4/6 and magenta=5/6.
The values returned by rainbow
can be used with a
col=
specification in graphics functions or in par
.
colors
, rgb
, hsv
, gray
,
heat.colors
.