plotSurface2D: Contour plot of a 2D surface

In sdetorus: Statistical Tools for Toroidal Diffusions

Contour plot of a 2D surface

Description

Convenient wrapper for plotting a contour plot of a real function of two variables.

Usage

plotSurface2D(x = seq_len(nrow(z)), y = seq_len(ncol(z)), f, z = NULL,
  nLev = 20, levels = NULL, fVect = FALSE, ...)

Arguments

x, y	numerical grids fore each dimension. They must be in ascending order.
f	function to be plot. Must take a single argument (see examples).
z	a vector of length length(x) * length(y) containing the evaluation of f in the bivariate grid. If not provided, it is computed internally.
nLev	the number of levels the range of z will be divided into.
levels	vector of contour levels. If not provided, it is set to quantile(z, probs = seq(0, 1, l = nLev)).
fVect	flag to indicate whether f is a vectorized function (see examples).
...	further arguments passed to image

Value

The matrix z, invisible.

Examples

grid <- seq(-pi, pi, l = 100)
plotSurface2D(grid, grid, f = function(x) sin(x[1]) * cos(x[2]), nLev = 20)
plotSurface2D(grid, grid, f = function(x) sin(x[, 1]) * cos(x[, 2]),
              levels = seq(-1, 1, l = 10), fVect = TRUE)

sdetorus documentation built on June 22, 2024, 6:58 p.m.