Plot bivariate landscape into morphospace — plot_biv

An ad hoc wrapper for graphics::contour() / graphics::.filled.contour() / graphics::image(). Used internally for projecting landscapes into bivariate morphospaces.

plot_biv_landscape(
  landscape,
  display,
  type,
  levels,
  lwd,
  lty,
  col,
  drawlabels,
  alpha
)

Arguments

landscape: A list containing the results of akima::interp().
display: Either "contour" or "filled.contour".
type: Type of landscape to be plotted. Options are "theoretical" or "empirical".
levels: Levels to be used to create the contours.
lwd: Integer; width of the lines depicting contours.
lty: Integer; type of the lines depicting contours.
col: Colors used to represent the landscape contours.
drawlabels: Logical; should the labels indicating the value of each surface contour be plotted?
alpha: Transparency factor for filled contours.