PlotTernary: Ternary or Triangular Plots

In DescTools: Tools for Descriptive Statistics

Ternary or Triangular Plots

Description

PlotTernary plots in a triangle the values of three variables. Useful for mixtures (chemistry etc.).

Usage

PlotTernary(x, y = NULL, z = NULL, args.grid = NULL, lbl = NULL, main = "",...)

Arguments

x	vector of first variable. Will be placed on top of the triangle.
y	vector of second variable (the right corner).
z	vector of third variable (on the left corner).
args.grid	list of additional arguments for the grid. Set this argument to NA if no grid should be drawn. The usual color and linetype will be used.
main	overall title for the plot.
lbl	the labels for the corner points. Default to the names of x, y, z.
...	the dots are sent to points

Author(s)

Andri Signorell <[e-mail]> based on example code by W. N. Venables and B. D. Ripley mentioned

References

J. Aitchison (1986) The Statistical Analysis of Compositional Data. Chapman and Hall, p.360.

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

See Also

example in Skye

Examples

# some random data in three variables
c1 <- runif(25)
c2 <- runif(25)
c3 <- runif(25)

# basic plot
par(mfrow=c(1, 2))
PlotTernary(c1, c2, c3, args.grid=NA)

## Not run: 
# plot with different symbols and a grid using a dataset from MASS
data(Skye, package="MASS")

PlotTernary(Skye[c(1,3,2)], pch=15, col=DescTools::hred, main="Skye",
            lbl=c("A Sodium", "F Iron", "M Magnesium"))

## End(Not run)

DescTools documentation built on Sept. 26, 2024, 1:07 a.m.