Simple rainbow palette replacement

Simple rainbow palette replacement using variable saturation and vibrance

Usage

rainbow2(n, s = c(0.9, 0.7, 0.88, 0.55), v = c(0.92, 1, 0.85, 0.94), ...)

Arguments

n

integer number of colors requested

s, v

numeric vector of values to recycle as saturation and vibrance, respectively. The purpose is to improve visual distinction between adjacent and nearby colors in the color wheel.

...

additional arguments are passed to grDevices::rainbow():

• start,end to control the starting and ending hue [0,1],

• alpha for alpha opacity, default NULL adds no alpha,

• rev to reverse the color order.

Value

character vector of R colors.

See also

Other jam color functions: alpha2col(), applyCLrange(), col2alpha(), col2hcl(), col2hsl(), col2hsv(), color2gradient(), fixYellow(), fixYellowHue(), getColorRamp(), hcl2col(), hsl2col(), hsv2col(), isColor(), kable_coloring(), makeColorDarker(), rgb2col(), setCLranges(), setTextContrastColor(), showColors(), unalpha(), warpRamp()

Examples

showColors(list(
   `rainbow(24)`=grDevices::rainbow(24),
   `rainbow2(24)`=rainbow2(24),
   `rainbow2(24, rev=TRUE)`=rainbow2(24, rev=TRUE),
   `rainbow2(24, start=0.5, end=0.499)`=rainbow2(24,
      start=0.5, end=0.5-1e-5),
   `rainbow2(24, rev=TRUE,\nstart=0.5, end=0.499)`=rainbow2(24,
      rev=TRUE, start=0.5, end=0.5-1e-5)))