Creates a vector of n colors beginning with dark blue, ranging through
shades of blue, cyan, green, yellow and red, and ending with dark red.
Usage
jet.colors(n)
Arguments
n
numeric scalar specifying number of colors to be in the palette
Value
Returns vector of n colors names. This can be used either to create
a user-defined color palette for subsequent graphics, a col=
specification in graphics functions or in par.