createColorPalette: Create a color palette

In wStockhausen/wtsUtilities: Collection of miscellaneous utility functions developed by William Stockhausen

Create a color palette

Description

Creates a color palette (or returns a pre-defined one).

Usage

createColorPalette(
  name,
  n = 1,
  alpha = 1,
  start = 0,
  end = max(1, n - 1)/n,
  s = 1,
  v = 1,
  bias = 1,
  space = c("rgb", "Lab"),
  interpolate = c("linear", "spline"),
  clrs = c("#00007F", "blue", "#007FFF", "cyan", "#7FFF7F", "yellow", "#FF7F00", "red",
    "#7F0000"),
  showAsWheel = FALSE,
  showAsBar = FALSE
)

Arguments

name	name of base palette to use (pre-defined: 'rainbow','heat','topo', 'cm', and 'jet'; 'ramp' for new palette)
n	number of colors to include in palette
alpha	transparency (0-1)
start	value associated with 1st color in palette
end	value associated with last color in palette
s	parameter passed to "rainbow" function
v	parameter passed to "rainbow" function
bias	??
space	colorspace ('rgb' or 'Lab')
interpolate	interpolation scheme ('linear' or 'spline')
clrs	vector of colors defining base palette
showAsWheel	flag (T/F) to show the final palette as a colorwheel
showAsBar	flag (T/F) to show final palette as a colorbar

Details

New (interpolated) palettes can be created based on the following pre-defined palettes:
'rainbow', 'heat', 'topo', 'cm', and 'jet'
Specifying a pre-defined palette eliminates the need to specify the 'clrs' color vector.
Palettes can created based on arbitrary base palettes by specifying name as 'ramp' and providing a vector of colors to use as the base palette (via clrs). This approach uses the graphics function "colorRampPalette" to create the palette.

Value

a color palette

wStockhausen/wtsUtilities documentation built on March 16, 2024, 10:38 a.m.