triax.points: Triangle plot points

In plotrix/plotrix: Various Plotting Functions

Triangle plot points

Description

Display points on a triangle plot.

Usage

 triax.points(x,show.legend=FALSE,label.points=FALSE,
 point.labels=NULL,col.symbols=par("fg"),pch=par("pch"),
 bg.symbols=par("bg"),cc.axes=FALSE,...)

Arguments

x	Matrix or data frame where each row is three proportions or percentages that must sum to 1 or 100 respectively.
show.legend	Logical - whether to display a legend.
label.points	Logical - whether to call ‘⁠thigmophobe.labels⁠’ to label the points.
point.labels	Optional labels for the points and/or legend.
col.symbols	Color of the symbols representing each value.
pch	Symbols to use in plotting values.
bg.symbols	Background color for plotting symbols.
cc.axes	Clockwise or counterclockwise axes and ticks.
...	Additional arguments passed to ‘⁠points⁠’.

Details

In order for ‘⁠triax.points⁠’ to add points to an existing plot, the argument ‘⁠no.add⁠’ in the initial call to ‘⁠triax.plot⁠’ must be set to ‘⁠FALSE⁠’. Failing to do this will result in the points being plotted in the wrong places. It is then up to the user to call ‘⁠par⁠’ as in the example below to restore plotting parameters altered during the triangle plot.

‘⁠triax.points⁠’ displays each triplet of proportions or percentages as a symbol on the triangle plot. Unless each triplet sums to 1 (or 100), they will not plot properly and ‘⁠triax.points⁠’ will complain appropriately.

Value

A list of the ‘⁠x,y⁠’ positions plotted.

Author(s)

Jim Lemon

See Also

triax.plot,thigmophobe.labels

Examples

 data(soils)
 triax.return<-triax.plot(soils[1:10,],
  main="Adding points to a triangle plot",no.add=FALSE)
 triax.points(soils[11:20,],col.symbols="green",pch=3)
 par(triax.return$oldpar)

plotrix/plotrix documentation built on Feb. 19, 2024, 8:16 a.m.