s.chull: Plot of the factorial maps with polygons of contour by level...

In ade4: Analysis of Ecological Data: Exploratory and Euclidean Methods in Environmental Sciences

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

Description

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(s)

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)
}

ade4 documentation built on Feb. 16, 2023, 7:58 p.m.