piper.points {plotrix} | R Documentation |
Displays the points for the anions and cations in the Piper diagram.
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)
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. |
piper.points displays the points/polygons in the Piper diagram.
A list containing the coordinates of the points and optionally information about the indices and colors.
Mike Cheetham