ade4 (version 1.7-5)

scatter.coa: Plot of the factorial maps for a correspondence analysis

Description

performs the scatter diagrams of a correspondence analysis.

Usage

"scatter"(x, xax = 1, yax = 2, method = 1:3, clab.row = 0.75,  clab.col = 1.25, posieig = "top", sub = NULL, csub = 2, ...)

Arguments

x

an object of class coa

xax

the column number for the x-axis

yax

the column number for the y-axis

method

an integer between 1 and 3 1 Rows and columns with the coordinates of lambda variance 2 Columns variance 1 and rows by averaging 3 Rows variance 1 and columns by averaging

clab.row

a character size for the rows

clab.col

a character size for the columns

posieig

if "top" the eigenvalues bar plot is upside,vif "bottom" it is downside, if "none" no plot

sub

a string of characters to be inserted as legend

csub

a character size for the legend, used with par("cex")*csub

...

further arguments passed to or from other methods

References

Oksanen, J. (1987) Problems of joint display of species and site scores in correspondence analysis. Vegetatio, 72, 51--57.

Examples

data(housetasks)
w <- dudi.coa(housetasks, scan = FALSE)
if(adegraphicsLoaded()) {
  g1 <- scatter(w, method = 1, psub.text = "1 / Standard", posieig = "none", plot = F)
  g2 <- scatter(w, method = 2, psub.text = "2 / Columns -> averaging -> Rows", 
    posieig = "none", plot = F)
  g3 <- scatter(w, method = 3, psub.text = "3 / Rows -> averaging -> Columns ", 
    posieig = "none", plot = F)
  G <- ADEgS(list(g1, g2, g3), layout = c(2, 2))
  
} else {
  par(mfrow = c(2, 2))
  scatter(w, method = 1, sub = "1 / Standard", posieig = "none")
  scatter(w, method = 2, sub = "2 / Columns -> averaging -> Rows", posieig = "none")
  scatter(w, method = 3, sub = "3 / Rows -> averaging -> Columns ", posieig = "none")
  par(mfrow = c(1, 1))
}