hsl2col: convert HCL to R color

In jamba: Just Analysis Methods Base

convert HCL to R color

Description

Convert an HCL color matrix to vector of R hex colors

Usage

hsl2col(
  x = NULL,
  H = NULL,
  S = NULL,
  L = NULL,
  alpha = NULL,
  verbose = FALSE,
  ...
)

Arguments

x	numeric matrix of colors, with rownames "H", "S", "L", or if not supplied it looks for vectors H, S, and L accordingly.
H, S, L	numeric vectors supplied as an alternative to x, with ranges 0 to 360, 0 to 100, and 0 to 100, respectively.
alpha	numeric vector of alpha values, default NULL. If not supplied, and if x is supplied as a matrix with rowname "alpha", then values will be used from x["alpha",].
verbose	logical indicating whether to print verbose output.
...	other arguments are ignored.

Details

This function takes an HCL matrix,and converts to an R color using the colorspace package colorspace::polarLUV() and colorspace::hex().

When model="hcl" this function uses farver::encode_colour() and bypasses colorspace. In future the colorspace dependency will likely be removed in favor of using farver. In any event, model="hcl" is equivalent to using model="polarLUV" and fixup=TRUE, except that it should be much faster.

Value

vector of R colors, or where the input was NA, then NA values are returned in the same order.

See Also

Other jam color functions: alpha2col(), applyCLrange(), col2alpha(), col2hcl(), col2hsl(), col2hsv(), color2gradient(), fixYellow(), fixYellowHue(), getColorRamp(), hcl2col(), hsv2col(), isColor(), kable_coloring(), makeColorDarker(), rainbow2(), rgb2col(), setCLranges(), setTextContrastColor(), showColors(), unalpha(), warpRamp()

Examples

# See col2hcl() for more extensive examples

# Prepare a basic HSL matrix
x_colors <- c(red="red",
   blue="blue",
   yellow="yellow",
   orange="#FFAA0066");
hslM <- col2hsl(x_colors);
hslM;

# Now convert back to R hex colors
colorV <- hsl2col(hslM);
colorV;

showColors(list(x_colors=x_colors,
   colorV=nameVector(colorV)));

jamba documentation built on April 4, 2025, 5:14 a.m.