This function sets up a color palette with
with gradually changing hues of grey, purple, blue, green, yellow,
orange, red, and brown (in this order). This palette is a
particularly good choice for
function, for which it is the default choice.
Number of colors to include in palette.
This function calls
colorRampPalette and returns
n colors from this palette.
n colors (in hexadecimal).
This function is called by default by the function
scatterplot.density, which is included in this
Original code was authored by Kristen Foley and included in the
scatterplot.density. Packaged into a new
function by Jenise Swall.
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