piper.points {plotrix}R Documentation

Display the points on a Piper diagram.

Description

Displays the points for the anions and cations in the Piper diagram.

Usage

 piper.points(ca,mg,so4,cl,ions=data.frame(ca=ca,mg=mg,so4=so4,cl=cl),sites,
  ppm=TRUE,chull=FALSE,pch=3,main="",cex.pch=1,col=NA,pch.lwd=0.7,plot.sep=0.15)

Arguments

ca,mg,so4,cl Concentrations of the ions.
ions data frame containing the above values.
sites indices for ions.
ppm Whether the concentrations are in milligrams/liter (parts per million) or milliequivalents.
chull Whether to display points or polygons for the concentrations.
pch Symbol to use in plotting points.
main title for the diagram
cex.pch Expansion for the points.
col Colors for the points/polygons.
pch.lwd Line widths.
plot.sep The offsets for the ions.

Details

piper.points displays the points/polygons in the Piper diagram.

Value

A list containing the coordinates of the points and optionally information about the indices and colors.

Author(s)

Mike Cheetham

See Also

piper.diagram


[Package plotrix version 2.7-2 Index]