plot.trifield: Plot a ternary field

In trifield: Some basic facilities for ternary fields and plots

Description

A simple wrapper around image and contour for plotting ternary fields

Usage

## S3 method for class 'trifield'
plot(x, contours = TRUE, col = topo.colors(256), lab1 = "A = 0", lab2 = "B = 0", lab3 = "C = 0", tribox = TRUE, axis.lines = TRUE, ...)

Arguments

x	An object of class trifield
contours	Make contours?
col	Color palette to use
lab1	First axis label
lab2	Second axis label
lab3	Third axis label
tribox	Draw a triangle around the plot?
axis.lines	Draw internal (altitute) axis lines?
...	Additional graphics parameters to be passed to plot

Details

This is a small demo function showing how one can make a ternary contour plot from a trifield object. The input object can be any list with x, y and z fields, but the result will be odd if non-NA z-values fall outside an equilateral triangle with unit altitude.

Value

None

Author(s)

Tim Keitt <[e-mail]>

References

http://dx.doi.org/10.1016/j.ecolmodel.2012.05.020

See Also

plot.default, image.default, contour.default

Examples

# See demo(trifield)
## Not run: 
grid.size = 128
par(mar = rep(2, 4), oma = rep(0, 4))
tg = ternary.grid(grid.size)
f = function(x)
        sin(2 * pi * x[1]) +
        sin(3 * pi * x[2]) +
        sin(4 * pi * x[3])
z = ternary.apply(tg, f)
tf = ternary.field(tg, z)
plot(tf)
ternary.legend()

## End(Not run)

Example output

trifield documentation built on May 29, 2017, 11:44 p.m.