Visualize Spectral Mixing of Munsell Colors

Lattice visualization demonstrating subtractive mixtures of colors in Munsell notation and associated spectra.

plotColorMixture(
  x,
  w = rep(1, times = length(x))/length(x),
  mixingMethod = c("exact", "reference"),
  n = 1,
  swatch.cex = 1.5,
  label.cex = 0.85,
  showMixedSpec = FALSE,
  overlapFix = TRUE
)

Arguments

x

vector of colors in Munsell notation, should not contain duplicates

w

vector of weights, can sum to any number

mixingMethod

approach used to simulate a mixture:

• exact: simulate a subtractive mixture of pigments, color conversion via CIE1931 color-matching functions (see mixMunsell())

• reference : simulate a subtractive mixture of pigments, selecting n closest reference spectra, requires gower package

n

number of closest mixture candidates when mixingMethod = 'reference' (see mixMunsell()), results can be hard to interpret when n > 2

swatch.cex

scaling factor for color swatch rectangle width and height, relative to label.cex, typically between 1 and 3

label.cex

scaling factor for swatch labels

showMixedSpec

show weighted geometric mean (mixed) spectra as dotted line (only when mixingMethod = 'reference')

overlapFix

attempt to "fix" overlapping chip labels via fixOverlap(), using method = 'E'

Value

a lattice graphics object

Details

If present, names attribute of x is used for the figure legend. See the expanded tutorial for examples.

See also

mixMunsell()

Author

D.E. Beaudette