Plot of the factorial maps with polygons of contour by level of a factor

performs the scatter diagrams with polygons of contour by level of a factor.

Usage

s.chull(dfxy, fac, xax = 1, yax = 2, 
    optchull = c(0.25, 0.5, 0.75, 1), label = levels(fac), clabel = 1, 
    cpoint = 0, 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 partioning the rows of the data frame in classes

xax

the column number of x in dfxy

yax

the column number of y in dfxy

optchull

the number of convex hulls and their interval

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

col

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

xlim

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

ylim

the ranges to be encompassed by the y axis, 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 segment (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

Value

The matched call.

Author

Daniel Chessel

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")

if(adegraphicsLoaded()) {
  s.class(xy, posi, ppoi.cex = 1.5, chullSize = c(0.25, 0.5, 0.75, 1), ellipseSize = 0, 
    starSize = 0, ppoly = list(col = "white", border = coul))
} else {
  s.chull(xy, posi, cpoi = 1.5, col = coul)
}