ade4 (version 1.2-2)

s.class: Plot of factorial maps with representation of point classes

Description

performs the scatter diagrams with representation of point classes.

Usage

s.class(dfxy, fac, wt = rep(1, length(fac)), xax = 1, 
    yax = 2, cstar = 1, cellipse = 1.5, axesell = TRUE, 
    label = levels(fac), clabel = 1, cpoint = 1, pch = 20, 
    col = rep(1, length(levels(fac))), xlim = NULL, ylim = NULL, 
    grid = TRUE, addaxes = TRUE, origin = c(0,0), 
    include.origin = TRUE, sub = "", csub = 1, possub = "bottomleft", 
    cgrid = 1, pixmap = NULL, contour = NULL, area = NULL, add.plot = FALSE)

Arguments

dfxy

a data frame containing the two columns for the axes

fac

a factor partitioning the rows of the data frame in classes

wt

a vector of the point weightings of the data frame used for computing the means (star centers) and the ellipses of dispersion

xax

the column number of x in dfxy

yax

the column number of y in dfxy

cstar

a number between 0 and 1 which defines the length of the star size

cellipse

a positive coefficient for the inertia ellipse size

axesell

a logical value indicating whether the ellipse axes should be drawn

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

pch

if cpoint > 0, an integer specifying the symbol or the single character to be used in plotting points

col

a vector of colors used to draw each class in a different color

xlim

the ranges to be encompassed by the x, if NULL they are computed

ylim

the ranges to be encompassed by the y, if NULL they are computed

grid

a logical value indicating whether a grid in the background of the plot should be drawn

addaxes

a logical value indicating whether the axes should be plotted

origin

the fixed point in the graph space, for example c(0,0) the origin axes

include.origin

a logical value indicating whether the point "origin" should be belonged to the graph space

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")

cgrid

a character size, parameter used with par("cex")* cgrid to indicate the mesh of the grid

pixmap

an object 'pixmap' displayed in the map background

contour

a data frame with 4 columns to plot the contour of the map : each row gives a line (x1,y1,x2,y2)

area

a data frame of class 'area' to plot a set of surface units in contour

add.plot

if TRUE uses the current graphics window

Examples

xy <- cbind.data.frame(x = runif(200,-1,1), y = runif(200,-1,1))
posi <- factor(xy$x > 0) : factor(xy$y > 0)
coul <- c("black", "red", "green", "blue")
par(mfrow = c(2,2))
s.class(xy, posi, cpoi = 2)
s.class(xy, posi, cell = 0, cstar = 0.5)
s.class(xy, posi, cell = 2, axesell = FALSE, csta = 0, col = coul)
s.chull(xy, posi, cpoi = 1)
par(mfrow = c(1,1))

data(banque)
dudi1 <- dudi.acm(banque, scannf = FALSE)
coul = rainbow(length(levels(banque[,20])))
par(mfrow = c(2,2))
s.label(dudi1$li, sub = "Factorial map from ACM", csub = 1.5, 
    possub = "topleft")
s.class(dudi1$li, banque[,20], sub = names(banque)[20], 
    possub = "bottomright", cell = 0, cstar = 0.5, cgrid = 0, csub = 1.5)
s.class(dudi1$li, banque[,20], csta = 0, cell = 2, cgrid = 0, 
    clab = 1.5)
s.class(dudi1$li, banque[,20], sub = names(banque)[20], 
    possub = "topright", cgrid = 0, col = coul)
par(mfrow = c(1,1))

par(mfrow = n2mfrow(ncol(banque)))
for (i in 1:(ncol(banque)))
    s.class(dudi1$li, banque[,i], clab = 1.5, sub = names(banque)[i], 
    csub = 2, possub = "topleft", cgrid = 0, csta = 0, cpoi = 0)
s.label(dudi1$li, clab = 0, sub = "Common background")
par(mfrow = c(1,1))