Calculates rgb values from spectra based on human colour matching functions.
spec2rgb(rspecdata, alpha = 1)Arguments
- rspecdata
(required) a data frame, possibly of class
rspec, which contains a column containing a wavelength range, named 'wl', and spectra data in remaining columns.- alpha
alpha value to use for colours (defaults to 1, opaque).
Value
A character vector consisting of hexadecimal colour values for passing to further plotting functions.
References
CIE(1932). Commission Internationale de l'Eclairage Proceedings, 1931. Cambridge: Cambridge University Press.
Examples
data(teal)
spec2rgb(teal)
#> Acrecca-01 Acrecca-02 Acrecca-03 Acrecca-04 Acrecca-05 Acrecca-06
#> "#21B662FF" "#00A860FF" "#00965FFF" "#00835DFF" "#006F5DFF" "#00595AFF"
#> Acrecca-07 Acrecca-08 Acrecca-09 Acrecca-10 Acrecca-11 Acrecca-12
#> "#0F4756FF" "#1E364EFF" "#242944FF" "#26223AFF" "#2C2339FF" "#2A2230FF"
# Plot data using estimated perceived colour
plot(teal, col = spec2rgb(teal), type = "overlay")
