Ternary plot with a partition in classes (levels of a factor)

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Description

This function represents a three dimensional scatter plot with a partition in classes (levels of a factor).

Usage

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triangle.class(dfxyz, fac, wt = rep(1, NROW(fac)), labels = levels(fac), 
  col = NULL, ellipseSize = 1, starSize = 1, chullSize = NULL, adjust = TRUE, 
  min3d = NULL, max3d = NULL, showposition = TRUE, facets = NULL, plot = TRUE, 
  storeData = TRUE, add = FALSE, pos = -1, ...)

Arguments

dfxyz

a three columns data frame used to produce the plot

fac

a factor (or a matrix of factors) splitting the rows of dfxyz

wt

a vector of weights for fac

labels

a character vector containing the class' labels

col

a logical, a color or a colors vector to color points, ellipses, labels, lines and polygons

ellipseSize

a positive number for ellipse size

starSize

a number between 0 and 1 for the size of the stars segments joining the stars' center (centroids) and the matching points

chullSize

NULL or a vector of numbers between 0 and 1 for the fraction of points included in the convex hull

adjust

a logical to adjust the device with the limits of the smaller equilateral triangle containing the values

min3d

a vector of three values for triangular minimal limits

max3d

a vector of three values for triangular maximal limits

showposition

a logical indicating whether the used triangle should be shown in the complete one

facets

a factor splitting the rows of dfxyz so that subsets of the data are represented on different sub-graphics

plot

a logical indicating if the graphics is displayed

storeData

a logical indicating if the data are stored in the returned object. If FALSE, only the names of the data arguments are stored

add

a logical. If TRUE, the graphic is superposed to the graphics already plotted in the current device

pos

an integer indicating the position of the environment where the data are stored, relative to the environment where the function is called. Useful only if storeData is FALSE

...

additional graphical parameters (see adegpar and trellis.par.get)

Value

An object of class ADEg (subclass Tr.class) or ADEgS (if showposition is TRUE, if add is TRUE and/or if facets are used).
The result is displayed if plot is TRUE.

Author(s)

Alice Julien-Laferriere, Aurelie Siberchicot aurelie.siberchicot@univ-lyon1.fr and Stephane Dray

See Also

Tr.class ADEg.Tr

Examples

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data(euro123, package = "ade4")
fac <- sort(rep(1:3, nrow(euro123$in78)))
df <- rbind.data.frame(euro123$in78, euro123$in86, euro123$in97)
row.names(df) <- paste(row.names(euro123$in78), rep(c(1, 2, 3), rep(12, 3)), sep = "")
triangle.class(df, fac = fac, label = row.names(df), showposition = TRUE, col = c(1, 2, 3))

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