CA biplot

Performs calculations for a CA biplot.

# S3 method for biplot
CA(
  bp,
  dim.biplot = c(2, 1, 3),
  e.vects = 1:ncol(bp$X),
  variant = "Princ",
  lambda.scal = FALSE
)

Arguments

bp

object of class biplot obtained from preceding function biplot(center = FALSE). In order to maintain the frequency table, the input should not be centered or scaled. For CA, bp should be a contingency table.

dim.biplot

dimension of the biplot. Only values 1, 2 and 3 are accepted, with default 2.

e.vects

which eigenvectors (canonical variates) to extract, with default 1:dim.biplot.

variant

which correspondence analysis variant, with default "Princ", presents a biplot with rows in principal coordinates and columns in standard coordinates. variant = "Stand", presents a biplot with rows in standard coordinates and columns in principal coordinates. variant = "symmetric", presents a symmetric biplot with row and column standard coordinates scaled equally by the singular values.

lambda.scal

logical value to request lambda-scaling, default is FALSE. Controls stretching or shrinking of column and row distances.

Value

an object of class CA, inherits from class biplot.

Examples

biplot(HairEyeColor[,,2], center = FALSE) |> CA() |> plot()