ade4 (version 1.01)

witwit.coa: Internal Correspondence Analysis

Description

performs an Internal Correspondence Analysis.

Usage

witwit.coa(dudi, row.blocks, col.blocks, scannf = TRUE, nf = 2)
summary.witwit(object, ...)

Arguments

dudi

an object of class 'coa'

row.blocks

a numeric vector indicating the row numbers for each block of rows

col.blocks

a numeric vector indicating the column numbers for each block of columns

scannf

a logical value indicating whether the eigenvalues bar plot should be displayed

nf

if scannf FALSE, an integer indicating the number of kept axes

object

an object of class 'witwit'

...

further arguments passed to or from other methods

code

dudi

link

as.dudi

item

• rbvar
• lbw
• cvar
• cbw

References

Cazes, P., Chessel, D. and Dol�dec, S. (1988) L'analyse des correspondances internes d'un tableau partitionn� : son usage en hydrobiologie. Revue de Statistique Appliqu�e, 36, 39--54.

Examples

data(ardeche)
coa1 <- dudi.coa(ardeche$tab, scann = FALSE, nf = 4)
ww <- witwit.coa(coa1, ardeche$row.blocks, ardeche$col.blocks, scann = FALSE)
ww
s.class(ww$co, ardeche$sta.fac, clab = 1.5, cell = 0, axesell = FALSE)
s.label(ww$co, add.p = TRUE, clab = 0.75)
summary(ww)