plotrix (version 2.1-5)

triax.points: 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"),...)

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.

...

Additional arguments passed to points.

Value

• A list of the x,y positions plotted.

Details

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.

See Also

triax.plot,thigmophobe.labels

Examples

data(soils)
 triax.plot(soils[1:10,],main="Adding points to a triangle plot")
 if(dev.interactive()) par(ask=TRUE)
 triax.points(soils[11:20,],col.symbols="green",pch=3)
 if(dev.interactive()) par(ask=FALSE)