ade4 (version 1.01)

supcol: Projections of Supplementary Columns

Description

performs projections of supplementary columns.

Usage

supcol(x, ...)
supcol.default (x, Xsup, ...) 
supcol.coa (x, Xsup, ...)

Arguments

x

an object used to select a method

Xsup

an array with the supplementary columns (Xsup and x$tab have the same row number)

...

further arguments passed to or from other methods

Value

• returns a data frame containing the coordinates of the supplementary projections

Details

If supcol.default is used, the column vectors of Xsup are projected without prior modification onto the principal components of dudi with the scalar product associated to the row weightings of dudi.

Examples

data(rpjdl)
rpjdl.coa <- dudi.coa(rpjdl$fau, scan = FALSE, nf = 4)
rpjdl.coa$co[1:3,]
supcol (rpjdl.coa,rpjdl$fau[,1:3]) # the same

data(doubs)
dudi1 <- dudi.pca(doubs$poi, scal = FALSE, scan = FALSE)
s.arrow(dudi1$co)
s.arrow(supcol.default(dudi1,data.frame(scalewt(doubs$mil))),
    add.p = TRUE, clab = 2)
symbols(0, 0, circles = 1, inches = FALSE, add = TRUE)