ade4 (version 1.5-2)

triangle.plot: Triangular Plotting

Description

Graphs for a dataframe with 3 columns of positive or null values triangle.plot is a scatterplot triangle.biplot is a paired scatterplots triangle.posipoint, triangle.param, add.position.triangle are utilitaries functions.

Usage

triangle.plot(ta, label = as.character(1:nrow(ta)), clabel = 0, 
    cpoint = 1, draw.line = TRUE, addaxes = FALSE, addmean = FALSE, 
    labeltriangle = TRUE, sub = "", csub = 0, possub = "topright", 
    show.position = TRUE, scale = TRUE, min3 = NULL, max3 = NULL, 
    box = FALSE)
triangle.biplot (ta1, ta2, label = as.character(1:nrow(ta1)), 
    draw.line = TRUE, show.position = TRUE, scale = TRUE)

Arguments

ta, ta1, ta2,

data frame with three columns, will be transformed in percentages by rows

label

a vector of strings of characters for the point labels

clabel

if not NULL, a character size for the labels, used with par("cex")*clabel

cpoint

a character size for plotting the points, used with par("cex")*cpoint. If zero, no points are drawn

draw.line

a logical value indicating whether the lines into the triangle should be drawn

addaxes

a logical value indicating whether the principal axes should be drawn

addmean

a logical value indicating whether the mean should be plotted

labeltriangle

a logical value indicating whether the variable names should be wrote

sub

a string of characters to be inserted as legend

csub

a character size for the legend, used with par("cex")*csub

possub

a string of characters indicating the sub-title position ("topleft", "topright", "bottomleft", "bottomright")

show.position

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

scale

a logical value indicating whether the smaller equilateral triangle containing the plot should be used

min3

If scale is FALSE, a vector of three values for the minima e.g. c(0.1,0.1,0.1) can be used

max3

If scale is FALSE a vector of three values for the maxima e.g. c(0.9,0.9,0.9) can be used

box

a logical value indicating whether a box around the current plot should be drawn

Value

• triangle.plot returns an invisible matrix containing the coordinates used for the plot. The graph can be supplemented in various ways.

Examples

data (euro123)
tot <- rbind.data.frame(euro123$in78, euro123$in86, euro123$in97)
row.names(tot) <- paste(row.names(euro123$in78), rep(c(1,2,3), rep(12,3)),
    sep = "")
triangle.plot(tot, label = row.names(tot), clab = 1)

par(mfrow = c(2,2))
triangle.plot(euro123$in78, clab = 0, cpoi = 2, addmean = TRUE, 
    show = FALSE)
triangle.plot(euro123$in86, label = row.names(euro123$in78), clab = 0.8)
triangle.biplot(euro123$in78, euro123$in86)
triangle.plot(rbind.data.frame(euro123$in78, euro123$in86), clab = 1, 
    addaxes = TRUE, sub = "Principal axis", csub = 2, possub = "topright")

triangle.plot(euro123[[1]], min3 = c(0,0.2,0.3), max3 = c(0.5,0.7,0.8),
    clab = 1, label = row.names(euro123[[1]]), addax = TRUE)
triangle.plot(euro123[[2]], min3 = c(0,0.2,0.3), max3 = c(0.5,0.7,0.8), 
    clab = 1, label = row.names(euro123[[1]]), addax = TRUE)
triangle.plot(euro123[[3]], min3 = c(0,0.2,0.3), max3 = c(0.5,0.7,0.8), 
    clab = 1, label = row.names(euro123[[1]]), addax = TRUE)
triangle.plot(rbind.data.frame(euro123[[1]], euro123[[2]], euro123[[3]]))

wtriangleplot <- cbind.data.frame(a = runif(100), b = runif(100), 
    c = runif(100,4,5))
wtriangleplot <- triangle.plot(wtriangleplot)
points(wtriangleplot, col = "blue", cex = 2)
wtriangleplot <- colMeans(wtriangleplot)
points(wtriangleplot[1], wtriangleplot[2], pch = 20, cex = 3, col = "red")
rm(wtriangleplot)