adegraphics (version 1.0-21)

s.class: 2-D scatter plot with a partition in classes (levels of a factor)

Description

This function represents a two dimensional scatter plot grouping points to the same class. Classes are represented by ellipses, stars and/or convex hulls.

Usage

s.class(dfxy, fac, xax = 1, yax = 2, wt = rep(1, NROW(fac)), labels = levels(fac),
  ellipseSize = 1.5, starSize = 1, chullSize = NULL, col = NULL, facets = NULL,
  plot = TRUE, storeData = TRUE, add = FALSE, pos = -1, ...)

Value

An object of class ADEg (subclass S2.class) or ADEgS (if add is TRUE and/or if facets or multidimensional fac or vectors for xax/yax are used).

The result is displayed if plot is TRUE.

Arguments

dfxy

a data frame used to produce the plot

fac

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

xax

an integer (or a vector) indicating which column(s) of dfxy is(are) plotted on the x-axis

yax

an integer (or a vector) indicating which column(s) of dfxy is(are) plotted on the y-axis

wt

a vector of weights for fac

labels

a character vector containing the class' labels

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

col

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

facets

a factor splitting the rows of dfxy 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 should be 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)

Author

Alice Julien-Laferriere, Aurelie Siberchicot and Stephane Dray

Details

Graphical parameters for ellipses, stars and convex hulls are available in pellipses, plines and ppolygons of adegpar.

See Also

S2.class ADEg.S2

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")
s.class(xy, fac = posi, col = coul, psub.text = "example s.class", pellipses.col = coul)

s.class(xy, fac = posi, ppoints.cex = 1.5, ellipseSize = 0, starSize = 0,
  ppolygons = list(border = 4:1, col = 1:4, lty = 1:4, lwd = 2, alpha = 0.4),
  chullSize = c(1, 0.5))

s.class(xy, fac = posi, facets = posi, ppoints.cex = 1.5, ellipseSize = 0, starSize = 0,
  ppolygons = list(border = 4:1, col = 1:4, lty = 1:4, lwd = 2, alpha = 0.4),
  chullSize = c(1, 0.5))
  
if (FALSE) { 
s.class(xy, fac = posi, col = coul, psub.text = "example s.class", pellipses.col = coul, 
  plabels.cex = 0, key = list(space = "left"))
   
data(banque, package = "ade4")
dudi1 <- ade4::dudi.acm(banque, scannf = FALSE)
col <- rainbow(length(levels(banque[, 20])))
g1 <- s.label(dudi1$li, psub = list(text = "Factorial map from ACM", cex = 1.5, 
  position = "topleft"), plot = FALSE)
g2 <- s.class(dudi1$li, banque[, 20], psub = list(text = names(banque)[20], cex = 1.5, 
  position = "bottomright"), ellipseSize = 0, starSize = 0.5, pgrid.text.cex = 0, plot = FALSE)
g3 <- s.class(dudi1$li, banque[, 20], starSize = 0, ellipseSize = 2, pgrid.text.cex = 0, 
  plabels.cex = 1.5, plot = FALSE)
g4 <- s.class(dudi1$li, banque[, 20], psub = list(text = names(banque)[20], 
  position = "topright"), pgrid.text.cex = 0, col = col, pellipses.lwd = 1.5, plot = FALSE)
G1 <- ADEgS(c(g1, g2, g3, g4), layout = c(2, 2))
G2 <- s.class(dudi1$li, banque, psub = list(position = "topleft"), pgrid.text.cex = 0, 
  starSize = 0, ppoints.cex = 0)
}