R: Plot of the factorial maps for a correspondence analysis

scatter.coa {ade4} | R Documentation

## Plot of the factorial maps for a correspondence analysis

### Description

performs the scatter diagrams of a correspondence analysis.

### Usage

    ## S3 method for class 'coa'
    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

### Author(s)

Daniel Chessel

### 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 = FALSE)
      g2 <- scatter(w, method = 2, psub.text = "2 / Columns -> averaging -> Rows",
        posieig = "none", plot = FALSE)
      g3 <- scatter(w, method = 3, psub.text = "3 / Rows -> averaging -> Columns ",
        posieig = "none", plot = FALSE)
      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))
    }

[Package ade4 version 1.7-16 Index]