hydrogeo (version 0.4-1)

piper-class: Class piper

Description

Objects of this class are plotable as Piper-Hill diagrams. A dataframe of major ions as percentages can be used to initialise a piper object.

Usage

"initialize"(.Object, l, ..., call = NULL, group = NULL, wt.col = NULL, pt.col = NULL)
"labelAxes"(x, cex.axis = 0.35, side = -1, ...)
"plot"(x, type = "p", ...)
"show"(object)

Arguments

.Object

object of class piper

l

list of data, see 'Examples' below

...

additional arguments, as for piper

call

the call that asked for the new piper object

group

(untested) Object of class vector, a second factor to group by, to allow plotting on different plots

wt.col

(untested) Water type colours

pt.col

Object of class vector of colours for points

x

an object of class piperplot

cex.axis

magnification to be used for axis annotation relative to the current setting of 'cex', see help("par")

side

integer between 1 and 10 specifying which side to lable, the default is to label all

type

what type of plot should be drawn, only "p" for *p*oints is useful

object

an object of class piper

Methods (by generic)

• initialize: Initialiser
• labelAxes: Lable the axes
• plot: Plot an object of class piper
• show: Show an object of class piper

Slots

Ca

Object of class vector --- Calcium

Mg

Object of class vector --- Magnesium

Cl

Object of class vector --- Chloride

SO4

Object of class vector --- Sulphate

WaterType

Object of class vector --- factor for grouping samples

anion.x

x coordinate of the point on the anion triangle (internal)

anion.y

y coordinate of the point on the anion triangle (internal)

cation.x

x coordinate of the point on the cation triangle (internal)

cation.y

y coordinate of the point on the cation triangle (internal)

diamond.x

x coordinate of the point on the diamond (internal)

diamond.y

y coordinate of the point on the anion diamond (internal)

group

Object of class vector Another way of grouping other than WaterType

IDs

Object of class vector of sample identifiers

pt.col

Object of class vector of colours for points

pt.pch

Object of class vector of symbols for points

call

Object of class character --- call that created it

References

A. Zaporozec, ``Graphical interpretation of water quality data,'' Ground Water 10, no. 2 (1972): 32--43.

Examples

showClass("piper")

l <- list( Ca = c(43,10,73,26,32),
           Mg = c(30,50,3,14,12),
           Cl = c(24,10,12,30,43),
           SO4 = c(24,10,12,30,43),
           WaterType = c(2,2,1,2,3),
           IDs = c("A","B","C","D","E") )

lp <- piper(l)
plot( lp, main="Piper-Hill Diagram of Water Quality" )