Plot options for
jndplot(x, arrow = c("relative", "absolute", "none"), achro = FALSE, arrow.labels = TRUE, arrow.col = "darkgrey", arrow.p = 1, labels.cex = 1, margin = "recommended", square = TRUE, ...)
(required) the output from a
If and how arrows indicating receptor vectors should be
drawn. Options are
Logical. Should the achromatic variable be plotted as a
dimension? (only available for dichromats and trichromats, defaults to
Logical. Should labels be plotted for receptor arrows?
color of the arrows and labels.
scaling factor for arrows.
scaling factor for arrow labels.
Logical. Should a square plotting area be used? (defaults to
additional parameters to be passed to
Creates a plot, details of the plot depend on the input data.
arrow argument accepts three options:
'relative': With this option, arrows will be made relative to the data. Arrows
will be centered on the data centroid, and will have an arbitrary length of half the
average pairwise distance between points, which can be scaled with the
'absolute': With this option, arrows will be made to reflect the visual system
underlying the data. Arrows will be centered on the achromatic point in colorspace, and
will have length equal to the distance to a monochromatic point (i.e. a color that
stimulates approximately 99.9
arrow.p argument, in which case they cannot be interpreted as described.
'none': no arrows will be included.
Pike, T.W. (2012). Preserving perceptual distances in chromaticity diagrams. Behavioral Ecology, 23, 723-728.