Adds a legend to a static tetrahedral colourspace plot.

legendtetra(x = 0.8, y = 1.2, ...)

Arguments

x

position of the legend relative to plot limits (usually a value between 0 and 1, but because of the perspective distortion, values greater than 1 are possible)

y

position of the legend relative to plot limits (usually a value between 0 and 1, but because of the perspective distortion, values greater than 1 are possible)

...

additional arguments passed to legend().

Value

legendtetra() adds a legend to a static tetrahedral colourspace plot. for additional information on which arguments are necessary and how they are used, see legend().

Author

Rafael Maia rm72@zips.uakron.edu

Examples

data(sicalis)

vis_sicalis <- vismodel(sicalis)
tcs_sicalis <- colspace(vis_sicalis)

cols <- c("#1B9E77", "#D95F02", "#7570B3")
plot(tcs_sicalis, col = cols)
legendtetra(
  legend = c("Crown", "Throat", "Breast"),
  col = cols, pch = 16
)