CODEWITHSUNDEEP
rlattice
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Reputation: 964

R lattice: how to make custom axis

I am using levelplot from R lattice package. I would like to make axis with my custom ticks and labels. Currently, I have the following:

enter image description here

I would like both axis be marked as the following: -pi, -0.5pi, 0, 0.5pi, pi, etc...

Upvotes: 0

Views: 400

Answers (1)

Johan Larsson
Johan Larsson

Reputation: 3694

Something like this?

library(lattice)

x <- seq(pi / 4, 5 * pi, length.out = 100)
y <- seq(pi / 4, 5 * pi, length.out = 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(y = list(at = c(pi, 2 * pi, 3 * pi, 4 * pi),
                                 label = c("pi", "2pi", "3pi", "4pi"))))

enter image description here

By the way, please do create your own reproducible example next time.

Upvotes: 1

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