ColorMapTricolore: CIE-Lch Mixture of Ternary Composition

In jschoeley/tricolore: A Flexible Color Scale for Ternary Compositions

CIE-Lch Mixture of Ternary Composition

Description

Return the ternary balance scheme colors for a matrix of ternary compositions.

Usage

ColorMapTricolore(P, center, breaks, h_, c_, l_, contrast, spread)

Arguments

P	n by 3 matrix of ternary compositions [p1, p2, p3](i) for i=1, ..., n.
center	Ternary coordinates of the grey-point.
breaks	Number of breaks in the discrete color scale. An integer >1. Values above 99 imply no discretization.
h_	Primary hue of the first ternary element in angular degrees [0, 360].
c_	Maximum possible chroma of mixed colors [0, 200].
l_	Lightness of mixed colors [0, 100].
contrast	Lightness contrast of the color scale [0, 1).
spread	Spread of the color scale around center > 0.

Value

An n row data frame giving, for each row of the input P, the input proportions [p1, p2, p3], parameters of the color mixture (h, c, l) and the hex-rgb string of the mixed colors (rgb).

Examples

# NOTE: only intended for internal use and not part of the API
P <- prop.table(matrix(runif(9), ncol = 3), 1)
tricolore:::ColorMapTricolore(P, center = rep(1/3, 3), breaks = 4,
                              h_ = 80, c_ = 140, l_ = 80,
                              contrast = 0.4, spread = 1)

jschoeley/tricolore documentation built on May 18, 2024, 10:57 p.m.