s.value: Representation of a value in a graph

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

Representation of a value in a graph

Description

performs the scatter diagram with the representation of a value for a variable

Usage

s.value(dfxy, z, xax = 1, yax = 2, method = c("squaresize", "greylevel"), 
    zmax=NULL, csize = 1, cpoint = 0, pch = 20, clegend = 0.75, neig = NULL, 
    cneig = 1, xlim = NULL, ylim = NULL, grid = TRUE, addaxes = TRUE, 
    cgrid = 0.75, include.origin = TRUE, origin = c(0,0), sub = "", 
    csub = 1, possub = "topleft", pixmap = NULL, contour = NULL, 
    area = NULL, add.plot = FALSE)

Arguments

dfxy	a data frame with two coordinates
z	a vector of the values corresponding to the rows of dfxy
xax	column for the x axis
yax	column for the y axis
method	a string of characters "squaresize" gives black squares for positive values and white for negative values with a proportional area equal to the absolute value. "greylevel" gives squares of equal size with a grey level proportional to the value. By default the first choice
zmax	a numeric value, equal by default to max(abs(z)), can be used to impose a common scale of the size of the squares to several drawings in the same device
csize	a size coefficient for symbols
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
clegend	a character size for the legend used by par("cex")*clegend
neig	a neighbouring graph
cneig	a size for the neighbouring graph lines used with par("lwd")*cneig
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
cgrid	a character size, parameter used with par("cex")*cgrid to indicate the mesh of the grid
include.origin	a logical value indicating whether the point "origin" should be belonged to the graph space
origin	the fixed point in the graph space, for example c(0,0) the origin axes
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")
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

if(!adegraphicsLoaded()) {
  xy <- cbind.data.frame(x = runif(500), y = runif(500))
  z <- rnorm(500)
  s.value(xy, z)
  
  s.value(xy, z, method = "greylevel")
  
  data(rpjdl)
  fau.coa <- dudi.coa(rpjdl$fau, scan = FALSE, nf = 3)
  s.value(fau.coa$li, fau.coa$li[,3], csi = 0.75, cleg = 0.75)
  
  data(irishdata)
  par(mfrow = c(3, 4))
  irq0 <- data.frame(scale(irishdata$tab, scale = TRUE))
  for (i in 1:12) {
    z <- irq0[, i]
    nam <- names(irq0)[i]
    s.value(irishdata$xy, z, area = irishdata$area, csi = 3,
      csub = 2, sub = nam, cleg = 1.5, cgrid = 0, inc = FALSE,
      xlim = c(16, 205), ylim = c(-50, 268), adda = FALSE, grid = FALSE)
  }
}

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