I am trying to make "Level Plots" in R, and I am following the instructions from here: levelplot function - RDocumentation
library(lattice) x <- seq(pi/4, 5 * pi, length = 100) y <- seq(pi/4, 5 * pi, length = 100) r <- as.vector(sqrt(outer(x^2, y^2, "+"))) grid <- expand.grid(x=x, y=y) grid$z <- cos(r^2) * exp(-r/(pi^3)) levelplot(z~x*y, grid, cuts = 50, scales=list(log="e"), xlab="", ylab="", main="Weird Function", sub="with log scales", colorkey = FALSE, region = TRUE)
Is there any way to add a legend to this plot? There does not seem to be any indication of a legend option in the "rdocumentation".
Is there really no simple way to add a legend to this level plot?